Here you find the upcoming and past talks and colloquia. The colour code and abbreviations:
Seminar of the Institute Quantum Theory Seminar
General Relativity Seminar Seminar of the Helmholtz Institute
Colloquium of the Faculty Other Talks
Seminar of Research Training Group

HS: Hörsaal (Lecture Hall), SR: Seminarraum (Seminar room), URZ Universitätsrechenzentrum (Computer Center)

Upcoming Talks


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July 2019
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You can also access a full calendar with extended functionality.

Past Talks

Talks from 2016-10-01 up to Today
Wed, 2019-05-08 16:15(HS 2, Abbeanum)
Local, global, and spacetime symmetries: What is physical?
Prof. Dr. Axel Maas (Graz U.)

In conventional quantum field theories only global symmetries can be
used to classify physical states. Taking this seriously implies that
local gauge symmetries cannot have physical meaning. It is shown how
this affects our understanding of elementary particles, especially the
Higgs and the weak gauge bosons, and what are the implications for both
current experiments as well as searches for new physics. Finally, this
becomes aggravated in attempts to formulate quantum gravity. The
challenges faced in this context and their potential implications will
be outlined.
Wed, 2019-03-27 14:00
SpECTRE: Towards Exascale Relativistic Astrophysics Simulations
Nils Deppe
Ph.D. Candidate, Physics, Cornell University
Teukolsky Group and SXS Collaboration

Mon, 2019-03-25 16:00(HS 1, Abbeanum)
Constraining supranuclear baryonic and ultra-light axionic matter in the multi-messenger astronomy era
Dr. Tim Dietrich, Nikhef, Amsterdam

Wed, 2019-03-13 18:00(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Gravitational Favorites: Formalisms, Trumpets and Critical Phenomena
Prof. Thomas Baumgarte, Bodowin College
Mon, 2019-01-28 16:15
Photonenpaarerzeugung durch spontane Frequenzkonversion in komplexen Wellenleitersystemen
Habilitationsvorstellung - Dr. Frank Setzpfandt,
Institut für Angewandte Physik
Fri, 2019-01-25 16:15(HS 2, Abbeanum)
Black Hole Driven Jets in Images of the Event Horizon Telescope in M87
Dr. Roman Gold, University of Frankfurt
Mon, 2019-01-14 16:15
Holocene geomagnetic field reconstructions and their application to estimate past auroral zones
Dr. Monika Korte,
Helmholtz-Zentrum Potsdam,
Deutsches GeoForschungszentrum
Fri, 2018-12-14 16:00(HS 2, Abbeanum)
Discontinuous Galerkin Methods for the Wave Equation
Defense of Master Thesis, Friedrich Horschig, University of Jena
Mon, 2018-12-10 16:15
Galaxienhaufen und die Entwicklung kosmischer Magnetfelder
Habilitationsvorstellung - Dr. Matthias Hoeft,
Thüringer Landessternwarte, Tautenburg
Thu, 2018-12-06 14:15
The Nucleon Axial Coupling from QCD
Evan Berkowitz (Forschungszentrum Jülich)

The axial coupling of the nucleon, gA = 1.2723(23), is the strength of the nucleon's coupling to the weak axial current of the Standard Model. It dictates the rate at which neutrons decay into protons, the strength of the attractive long-range force between nucleons, and other features of nuclear physics. To disentangle Standard Model effects from new physics, precision tests of the Standard Model in nuclear environments require a quantitative understanding of nuclear physics rooted in QCD, the theory of quarks and gluons. The nucleon axial coupling has long been considered a critical benchmark for lattice QCD, and yet proved substantially more challenging to calculate than expected. I will describe and give an update to our recent percent-level calculation, gA = 1.271(13), and how our method differs from existing approaches.
Mon, 2018-12-03 16:15
Abbildung biologischer Zellen mit Hilfe von Röntgenstrahlung
Prof. Dr. Sahrah Köster,
Georg-August-Universität, Göttingen
Wed, 2018-11-28 16:15(HS 2, Abbeanum)
Neutron Star Mergers, Electromagnetic Counterparts and Nucleosynthesis
Dr. Albino Perego, INFN Milano, Italy
Fri, 2018-11-23 16:00(HS 2, Abbeanum)
Hierarchical method for reconstruction of gravitational-wave models
Matteo Breschi,
University Jena
Mon, 2018-11-19 16:15
Laboratory water-window-x-ray microscopy
Prof. Dr. Hans Hertz,
KTH Royal Institute of Technology, Stockholm
Fri, 2018-11-16 17:00(HS 2, Abbeanum)
Diagnostic of the conditions at the base of the optically thick winds on Wolf-Rayet stars in the Galaxy and LMC
Vsevolod Nedora, TPI Jena
(Short Presentation and Discussion)
Fri, 2018-11-16 16:00(HS 2, Abbeanum)
Gravitational wave surrogate models
Reetika Dudi, TPI Jena
(Short Presentation and Discussion)
Fri, 2018-11-09 14:00(Konferenzraum, Max-Wien-Platz 1)
Novel Concepts of Magnetic Data Storage: A time-resolved View
Prof. Dr. Stefan Eisebitt,
Max-Born-Institut Berlin
Thu, 2018-11-08 14:15
Double-copy structures from and in string amplitudes
Oliver Schlotterer (AEI Golm)
Wed, 2018-11-07 16:15
The web of double-copy relations among gauge theories, gravity and effective field theories
Oliver Schlotterer (AEI Golm)
Mon, 2018-10-29 14:00(HS 2, Abbeanum)
Ehrenkolloquium - Bitte separaten Aushang beachten
Anlässlich des 70. Geburtstages von Prof. Dr. F. Lederer
Prof. Dr. Ulf Peschel
Prof. Dr. Roberto Marandotti
Prof. Dr. Gaetano Assanto
Prof. Dr. Kurt Busch
Prof. Dr. Roland Schiek
Prof. Dr. Carsten Rockstuhl
Mon, 2018-10-22 16:15(HS 1, Abbeanum)
Gravitation: Theory and Experiment
Ehrenkolloqium anlässlich des 60. Geburtstages von Prof. Dr. R. Meinel.

Prof. Piotr Chrusciel (Universität Wien)
Older and newer progress in experimental and theoretical issues of current interest in general relativity.
(In English)

Ab 15.45 Uhr Kaffee und Kuchen vor dem Hörsaal.
Wed, 2018-10-17 16:15(HS 2, Abbeanum)
From loops and groups to black hole entropy 
- horizons in loop quantum gravity
Prof. Dr. Hanno Sahlmann (Erlangen)
Tue, 2018-08-28 14:00(Seminar Room 102, Abbeanum)
Recurrence analysis of spinning particles in the Schwarzschild background
Ondrej Zelenka
Mon, 2018-08-13 10:15(Seminar Room 102, Abbeanum)
Spontenous Symmetry Breaking in Four Fermi Theories
Master thesis defence of Julian Johannes Lenz
Mon, 2018-07-09 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Image scanning microscopy and metal-induced energy transfer: New approaches to super-resolution microscopy
Prof. Dr. Jörg Enderlein
Georg-August-Universität Göttingen
Wed, 2018-07-04 16:15(HS 2, Abbeanum)
Spin foams and background independent renormalization
Dr. Sebastian Steinhaus (Perimeter Institute)

Spin foams models are a background independent path integral
approach to quantum gravity. In a nutshell, they can be seen as generalized
lattice gauge theories, where the sum over geometries is encoded in a sum
over group-theoretic data encoding the shape and face areas of polyhedra.

In this talk I will give a brief introduction to spin foams and outline the
construction for 4D quantum gravity. After reviewing some of their
achievements I will discuss open outstanding issues and how these are
addressed by renormalization. To do so I will introduce a framework for
renormalizing background independent theories and how numerical methods are
used to implement this scheme in practice.
Tue, 2018-07-03 14:15(Konferenzraum TPI 210b)
Improved initial data for binary neutron stars
Prof. Wolfgang Tichy
Tue, 2018-06-19 17:15(HS 2, Helmholtzweg 5)
Zur Hyperbolizität der Evolutionsgleichungen von relativistischen Flüssigkeiten
Disputation von Andreas Schoepe
Mon, 2018-06-11 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Nanosytems: A landscape for dimensional tunability with high pressure
Prof. Dr. Alfonso San Miguel
Institute Lumiére Matiére,
Université Lyon 1
Thu, 2018-06-07 14:15
Towards reconstructing the quantum effective action of gravity
Dr. Benjamin Knorr (RU Nijmegen)

I will present a new method to constrain the quantum effective action of
gravity, inspired by recent results from causal dynamical triangulations
(CDT). After a short introduction to CDT, I will start from a
parameterisation of the effective action to calculate correlation
functions for observable quantities. Matching these correlators to CDT
data allows to reverse-engineer the couplings which describe the
effective dynamics. As a concrete example, the autocorrelation of
spatial volume fluctuations is considered. The comparison to CDT data
suggests the existence of non-local interaction terms, which might have
interesting phenomenological consequences for the interpretation of dark
Wed, 2018-06-06 16:15(HS 2, Abbeanum)
A new class of quasinormal modes of neutron stars in scalar-tensor gravity
Dr. Néstor Ortiz, TPI
Mon, 2018-06-04 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Quantum Gravity/String Theory Constraints on Inflation
PD Dr. Ralph Blumenhagen
Max-Planck-Institut für Physik,
Thu, 2018-05-31 14:15(SR 5, Helmholtzweg 4)
Exact RG equation and gauge symmetry
Shimasadat Asnafi (Sharif University of Technology, Teheran)
Mon, 2018-05-28 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Imaging across scales - from tissue to DNA
Prof. Dr. Theo Lasser
Laboratoire d'Optique Biomedicale, Ecole Polytechnique Fédérale de Lusanne
Tue, 2018-05-15 16:15
Inhomogeneous phases at high density in QCD-inspired models
Jun.Prof. Marc Wagner, Adrian Königstein
Mon, 2018-05-14 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Thüringen - Ursprung der Astronomiemethodik ?
Dr. Olaf Kretzer,
Schul- und Volkssternwarte Suhl
Mon, 2018-05-07 16:00(Hörsaal 1, Max-Wien-Platz)
Physikalisches Kolloquium - Physik: Triumph und Tragödie
Prof. Dr. H. Lesch, Universität München
Thu, 2018-04-26 14:15(Seminar Room 102, Abbeanum)
Non- and Ultrarelativistic Bootstraping of Conformal Field Theories in two dimensions
Masterverteidigung von Ricardo Oude Weernink
Mon, 2018-04-23 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Habilitationsvorstellung - Investigation of carrier dynamics in semiconductors on the electronic timescale
Dr Michael Zürich
Institut für Optik und Quantenelektronik, FSU Jena
Thu, 2018-02-22 14:15
Gauged Baby Skyrme Model with and without Chern-Simons term
Albert Samoilenka,
Department of Physics, Minsk
Mon, 2018-02-05 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Kann die Hypothese, dass Dunkle-Materie-Teilchen existieren, mit Astronomischen Daten falsifiziert werden?
Prof. Dr. Pavel Kroupa
Universität Bonn
Tue, 2018-01-30 16:15
Tails of steady states and non-Killing horizons (Dr. Benjamin Withers, Geneva)
Wed, 2018-01-24 16:15
Gravitational Waves and Numerical Relativity
Prof. Harald Pfeiffer, AEI Potsdam
The past two years have witnessed the advent of gravitational wave
(GW) astronomy led by the Advanced LIGO and Virgo GW detectors, which
have announced the observation of six binary black holes and one
binary neutron star. GW astronomy relies on knowledge of the
gravitational waveforms for a variety of reasons: To design the search
strategies to detect gravitational waves, to measure masses, spins and
tidal parameters of the coalescing compact objects, and also to test
general relativity and to search for signatures of physics beyond
classical general relativity. This talk summarizes the GW
observations of LIGO and Virgo, and elucidates the interplay between
data-analysis and waveform modeling. Particular emphasis will be paid
to numerical relativity simulations, the only means to compute the
gravitational waves emitted during the genuinely nonlinear and dynamic
late inspiral and merger phase of compact object binaries.
Tue, 2018-01-23 16:15(SR 5, Helmholtzweg 4)
On Spectral Properties of Spin-Boson Models
Talk by Markus Lange

We consider a quantum mechanical system, which is modeled by a Hamiltonian acting on a finite dimensional space with degenerate eigenvalues interacting with a field of relativistic bosons. Provided a mild infrared assumption holds, we prove existence of the ground state eigenvalues and ground state eigenvectors using operator theoretic renormalization. We show that the eigenvectors and eigenvalues are analytic functions of the coupling constant in a cone with apex at the origin.
Wed, 2018-01-17 16:15
Dr. Andreas Ringwald (DESY, Hamburg)
Tue, 2018-01-16 16:15(SR 5, Helmholtzweg 4)
Spin memory effect and charges of the extended BMS algebra
Speaker: Dr. David A. Nichols
Room: SR 5 Helmholtzweg 4
The gravitational-wave memory effect is an unusual prediction of general relativity characterized by an asymptotically constant change in the gravitational-wave strain between early and late times. It produces a measurable effect for freely falling observers (a lasting displacement), it is generated by fluxes of matter and gravitational waves near null infinity, and it is closely related to the symmetry group of asymptotically flat spacetimes, the Bondi-Metzner-Sachs (BMS) group. Recently, however, there have been proposals that the symmetries of asymptotically flat spacetimes are the larger, extended BMS algebra. There are finite charges related to these additional symmetries, and changes in these charges produce a new kind of memory effect called spin memory. In this talk, I will introduce and discuss the gravitational-wave memory effect, the spin memory, and the conserved charges related to the extended BMS algebra. I will also discuss how these memory effects could be measured from binary black hole mergers using ground- and space-based gravitational-wave detectors.
Mon, 2018-01-15 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Weyl Semimetals and beyond!
Prof. Dr. Claudia Felser
Max-Planck-Institute for Chemical Physics of Solids, Dresden
Wed, 2018-01-10 17:00(HS 2, Abbeanum)
Schwarze Löcher in Kaluza-Klein-Theorie
Verteidigung der Dissertation von Michael Kalisch
Mon, 2018-01-08 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Habilitationsvorstellung " Laboratory astrophysics: spectroscopy and instrumentation for the gas phase and the solid state"
Dr. Alexey Potapov
Wed, 2017-12-13 10:15
Solution of sign-problem in 3d Potts-model at finite chemical potential
Prof. Urs Wenger
(Uni Bern)
Tue, 2017-12-12 17:15(HS 2, Helmholtzweg 5)
Promotionsverteidigung: Dreidimensionale Vier-Fermion-Theorien mit exakter chiraler Symmetrie auf dem Gitter
Verteidigung der Doktorarbeit von Daniel Schmidt

Nach einer Einführung in spontane Symmetriebrechung werden neue Ergebnisse für die kritischen Exponenten des Gross-Neveu-Modells und Resultate bezüglich der kritischen Flavourzahl des Thirring-Modells präsentiert.
Mon, 2017-12-11 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Der Mechanismus von Antikythera
Dr. Rita Gautschy
Universität Basel
Thu, 2017-12-07 14:15(SR 5, Helmholtzweg 4)
Scalar and vector charmonium resonances on the lattice
Stefano Piemonte
University of Regensburg
Wed, 2017-12-06 16:15(HS 2, Abbeanum)
Short Gama-Ray Bursts: an observer's view
Dr. Sylvio Klose, Landessternwarte Tautenburg
Tue, 2017-12-05 16:15(SR 5, Helmholtzweg 4)
Simulating Binary Neutron Star Mergers in the Multi-Messenger Era
Prof. Bruno Giacomazzo (University of Trento)

I will present results of fully general relativistic magnetohydrodynamic (GRMHD) simulations of binary neutron star mergers performed by my group in Trento. Thanks to the detection of GW170817 the new era of multi-messenger astrophysics has finally started. That
detection provided us with evidence for the first time of the connection between binary neutron star mergers and short gamma-ray
bursts as well as other electromagnetic signals, such as the predicted kilonova emission. Numerical simulations of binary neutron stars have helped in the study of the dynamics of these systems during the last phases of inspiral, merger, and post-merger evolution. In this talk I will present results of numerical simulations performed by my group in Trento and that focused in particular on the effects that magnetic fields may have both in powering short gamma-ray bursts and in affecting the gravitational wave emission.
Mon, 2017-12-04 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
"The Physics Nobel Prize 2017: Gravitational Waves"
Herr Prof. Dr. B. Brügmann und
Herr Dr. R. Nawrodt
Wed, 2017-11-29 14:30(HS3, Abbeanum)
QCD matter with isospin-asymmetry and compact stars
Gergely Endrödi
Goethe University Frankfurt
Mon, 2017-11-27 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Proxima b and beyond
Dr. Guillem Anglada Escudé
Queen Mary University of London
Wed, 2017-11-22 16:15(HS 2, Abbeanum)
Gravitational waves, black holes and their interaction: a global perspective
Prof. J. Frauendiener, University of Otago

Abstract: It is well known that gravitational waves interact in a non-linear way. This makes it difficult to describe them rigourously. The cleanest description is based on a certain conformal invariance of the Einstein equations — a fact which was established by R. Penrose and was used by H. Friedrich to prove several important global results for general relativistic space-times. The so called conformal field equations implement this conformal invariance on the level of partial differential equations. They provide various well-posed initial (boundary) value problems for use in different situations. The talk will give a computational perspective on the non-linear interaction of plane gravitational waves and also present preliminary results of a simulation of the behaviour of an initially spherically symmetric black hole under the impact of a gravitational wave burst.
Wed, 2017-11-22 10:30(HS 2, Abbeanum)
event without name
Verteidigung Masterarbeit Tobias Felkl
Tue, 2017-11-21 17:15(HS 2, Helmholtzweg 5)
Promotionsverteidigung: Nichtlineare Wechselwirkungen von Gravitationswellen
Disputation von Stefan Palenta

Nach einer ausführlichen Einleitung zu Gravitationswellen und nichtlinearen Effekten werden die Grundlagen einer neuen Lösungstechnik für das charakteristische Anfangswertproblem kollidierender ebener Gravitationswellen vorgestellt. Unter Annahme einer ebenen Symmetrie vereinfachen sich die Einstein-Gleichungen zur Ernst-Gleichung. Diese nichtlineare partielle Differentialgleichung wird im Rahmen der inversen Streumethode zunächst in ein überbestimmtes System linearer Differentialgleichungen und schließlich in ein Riemann-Hilbert Problem überführt. Mehrdeutigkeiten in dessen Lösung führen zur Konstruktion einer ganzen Familie exakter Raumzeiten, welche die eigentliche Lösung des Anfangswertproblems verallgemeinert. Deshalb kann die vorgestellte Technik auch als eine interessante Methode zur Lösungserzeugung dienen. Das Verfahren wird anhand der Erweiterung der Szekeres-Klasse von Wellenkollisionsraumzeiten demonstriert. Die dadurch erhaltene Lösung beinhaltet als Grenzfall einen neuen Typ impulsiver Gravitationswellen mit zirkularer Polarisation.
Tue, 2017-11-21 15:30(SR 102 Abbeanum)
Magnetic fields near deformed black holes
Dr. Norman Gürlebeck,
Zentrum für angewandte Raumfahrttechnologie und Mikrogravitation Bremen
Mon, 2017-11-20 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Habilitationsvorstellung "Atomic Layer Deposition Materials for Optical Applications"
Dr. Adriana Szeghalmi
Institut für Angewandte Physik
Thu, 2017-11-16 14:15(SR 5, Helmholtzweg 4)
An Introduction to asymptotically safe Quantum Gravity
Stefan Lippoldt (University of Heidelberg)


This talk will start with a short reminder on the renormalization group concept,
and how this is implemented in the flow equation. In the following I will relate
this idea to quantum gravity (QG) focussing on the failure of perturbative QG.

In the main part of this talk I will discuss how the asymptotic safety (AS)
scenario may provide us with a non-perturbative way of quantizing gravity. For
this I will look at pure QG, demonstrating that the inclusion of the famous
Goroff-Sagnotti counter term of perturbative QG seems to pose no problem for the
AS conjecture.

Finally I will be concerned with the inclusion of matter. In particular I will
have a glimpse at the intimate interplay of gravity and matter in the ultraviolet.
Tue, 2017-11-14 16:15(SR 5, Helmholtzweg 4)
Real time dynamics, phase transitions and holography
Dr. Jakub Jankowski, Jagiellonian University

I will review recent results concerning the dynamics of holographic systems exhibiting various types of phase transformations
with a particular focus on first order transitions. The existence of the spinodal region is demonstrated
within linear and nonlinear response theory. The applicability of hydrodynamics in the critical region of the phase diagram
is shortly discussed.
Mon, 2017-11-13 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Plasma-based GeV Iepton accelerators
Prof. Dr. Mike Downer
University of Texas, Austin
Wed, 2017-11-08 16:15
Thermodynamic formalism for Selberg zeta functions: old and new
Prof. Anke Pohl
Institut für Mathematik und Informatik Jena
Tue, 2017-11-07 16:15
Entanglement entropy at non-equilibrium in holography
Daniel Fernandez, University of Iceland
Thu, 2017-11-02 17:15(HS 2, Helmholtzweg 5)
Disputation: Discontinuous Galerkin Methods for General Relativistic Hydrodynamics
Disputation of Marcus Bugner

Die Implementierung und Überprüfung einer neuen numerischen Methodik zur allgemeinrelativistischen Simulation von Neutronensternen wird vorgestellt.
Zur Behandlung der hydrodynamischen Variablen wurde sowohl eine diskontinuierliche Galerkin-Methode, als auch ein Finite-Volumen-Verfahren auf krummlinigen Gittern implementiert. Zusätzlich wurden dem Code Techniken zur Schockerkennung und -behandlung
Diese Bestandteile wurden in umfangreichen Tests validiert. Hierbei wurden numerische Fehler in der Massenerhaltung, in der Einhaltung von physikalischen Zwangsbedingungen und im Vergleich mit analytischen Lösungen betrachtet. Die zugehörigen Konvergenzordnungen aller Methoden wurden untersucht. Dabei wurde eine Konvergenzordnung ∼ 2 bei aktiver Schockbehandlung und mögliche Konvergenzordnungen > 2 für die reine diskontinuierliche Galerkin-Methode festgestellt. Weiterhin wurde bestätigt, dass die numerische Einhaltung der metrischen Identitäten essentiell für die Massenerhaltung in Fluiddynamik-Simulationen ist.
Mit Hilfe der reinen diskontinuierlichen Galerkin-Methode konnten physikalische Systeme ohne Schocks, wie etwa die Michel-Bondi-Akkretion, erfolgreich simuliert werden. Bei Neutronensternsimulationen hingegen wurden numerische Instabilitäten an der Sternoberfläche und ein Verlust der Konvergenz beobachtet. Erst eine aktive Schockbehandlung erlaubt die stabile und numerisch konvergente Simulation von statischen, rotierenden oder oszillierenden Neutronensternen.
Dank der vorgestellten Modifikationen des bamps Codes ist dieser nun in der Lage, die frontale Kollision zweier Neutronensterne zu simulieren. Neben der Extraktion des zugehörigen Gravitationswellensignals wurde die Simulation genutzt, um das nahezu ideale Skalierungsverhalten der Rechenzeit von bamps aufzuzeigen.


The Talk will be held in English
Thu, 2017-10-26 14:15
Asymptotically safe quantum gravity and the Standard Model
Aaron Held
Heidelberg University
Wed, 2017-10-25 17:00(HS 2, Abbeanum)
Disputation: Anomalies within Magnetic Holography
Disputation of Julian Leiber
Wed, 2017-10-25 15:00
Gauge/gravity duality and quantum information
Johanna Erdmenger (Würzburg)
Tue, 2017-10-24 16:15
Pseudo-Goldstone excitations in chiral Yukawa-theories with quadratic explicit symmetry breaking
Istvan Kaposvári
Eotvos University
Thu, 2017-10-19 14:15(SR 5, Helmholtzweg 4)
"Functional renormalization group and composite operators: concepts and applications"
Carlo Pagani,
Johannes Gutenberg-Universität Mainz


After introducing composite operators in the functional renormalization group framework, we discuss their use paying particular attention to the Asymptotic Safety scenario for quantum gravity. Some considerations regarding the products of composite operators will also be given.
Wed, 2017-10-18 12:15(GRK Besprechungsraum, HHW5)
Renormalization group analysis of momentum-dependent four-fermion interactions
Lennart Dabelow (TPI Jena), Master thesis defense
Mon, 2017-10-16 16:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Habilitationsvorstellung "Nanoscale Imaging and Spectroscopy with High-Photon-Flux Table-top XUV Sources"
Dr. Jan Rothhardt
Institut für Angewandte Physik
Mon, 2017-09-04 16:00(HS 2, Abbeanum)
Disputation: Asymptotic Safety in QFT - from quantum gravity to graphene
Disputation of Benjamin Knorr
Wed, 2017-07-19 16:15(HS 2, Abbeanum)
A c-Theorem for Two-dimensional Boundaries and Defects
talk by Andy O'Bannon (University of Southampton)

I will present a proof for a monotonicity theorem, or c-theorem, for a three-dimensional Conformal Field Theory (CFT) on a space with a boundary, and for a higher-dimensional CFT with a two-dimensional defect. The proof is applicable only to renormalization group flows that preserve locality, reflection positivity, and Euclidean invariance along the boundary or defect, and that are localized at the boundary or defect, such that the bulk theory remains conformal along the flow. The method of proof is a generalization of Komargodski’s proof of Zamolodchikov’s c-theorem. The key ingredient is an external “dilaton” field introduced to match Weyl anomalies between the ultra-violet (UV) and infra-red (IR) fixed points. Reflection positivity in the dilaton’s effective action guarantees that a certain coefficient in the boundary/defect Weyl anomaly must take a value in the UV that is larger than (or equal to) the value in the IR. This boundary/defect c-theorem may have important implications for many theoretical and experimental systems, ranging from graphene to branes in string theory and M-theory.
Thu, 2017-07-06 14:15
QED and QCD with massless fermions in three dimensions
Prof. Rajamani Narayanan (Florida International U)
Mon, 2017-07-03 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Aktivität von kühlen Sternen
Prof. Dr. Beate Stelzer
Eberhard Karls Universität Tübingen
Fri, 2017-06-30 16:15(HS 2, Abbeanum)
Geodätische in der Papapetrou-Majumdar-Metrik: Ein newtonsches Problem
Verteidigung der Masterarbeit von Jan Schumm
Mon, 2017-06-26 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Lateral and vertical aggregation of molecular adlayers affecting their optical and electronic properties
Dr. Roman Forker
Institut für Festkörperphysik
Thu, 2017-06-22 14:15
Renormalization of SU(2) Yang-Mills theory with Flow Equations
Alexandre Efremov (CPHT, Ecole Polytechnique, Palaiseau)

We give a proof of perturbative renormalizability of SU(2) Yang–Mills theory in four-dimensional Euclidean space. The main motivation is to present a proof which does not make appear mathematically undefined objects (as for example dimensionally regularized generating functionals). A large part of the proof is dedicated to bounds on massless correlation functions and to the restoration of the Slavnov-Taylor identities.
Tue, 2017-06-20 16:15(SR 5, Helmholtzweg 4)
(Some aspects of) operator algebras and quantum physics
Prof. Andrés Reyes Lega
Universidad de los Andes Bogotá, Kolumbien


After briefly reviewing some of the basic notions of operator algebras that are relevant for the algebraic approach to quantum physics, I will discuss two classes of C*-algebras that are relevant in quantum physics, namely the Weyl algebra and the CAR (or fermionic) algebra. Then, three examples of recent applications will be discussed: (i) the use of the GNS construction in the study of entanglement in systems of identical particles (ii) the Sorkin-Johnston state for scalar fields in curved spacetimes and (iii) the relation between the Shale-Stinespring theorem and the topology underlying the (thermodynamic) phase transition in the Ising model.
Mon, 2017-06-19 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Environmental & Biomedical Research with Laser Light
Prof. Dr. Dr.-Ing. E. h. Jürgen Wolfrum
Universität Heidelberg
Tue, 2017-06-13 16:15
Catching ghosts — from unitarity to asymptotic safety
Chris Ripken (Radboud University Nijmegen)


Higher derivative theories arise naturally in the context of effective quantum field theories. However, it is well-known that these theories generally are non-unitary.

The purpose of this talk is two-fold. First, I will show why higher derivative theories are unitarity violating by discussing its Euclidean analogue, which is called Reflection Positivity.

Secondly, we will consider a way of dealing with higher-derivative theories by means of the Renomalization Group. A requirement similar to Asymptotic Safety may be imposed on the infrared side of the RG trajectory to provide a unitary EFT.
Mon, 2017-06-12 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Investigating dense relativistic plasmas using high intensity laser pulses and x-ray free electron lasers
Dr. Christian Rödel
Institut für Optik und Quantenelektronik
Thu, 2017-06-08 14:15
Gauge theories at finite fermion density: avoiding the sign problem in the canonical formulation
Prof. Urs Wenger
(Uni Bern)

In this talk I discuss gauge theories at finite fermion density which, in general, suffer from a fermion sign problem. One approach to the sign problem is to use the canonical formulation where the fermion number is fixed. Using Wilson fermions on the lattice the canonical sectors of the theories can be obtained directly from transfer matrices explicitely defined through the fermion Dirac operator. As a first example, I consider supersymmetric SU(N) Yang-Mills theories in 0+1 dimensions and present some results concerning the moduli space of these theories. As a second example, I discuss QCD in the heavy-dense limit and show how the sign problem is avoided in the strong coupling limit. Finally, as a third example, related to heavy-dense QCD, I construct a cluster algorithm for the 3-state Potts model which solves the sign problem completely, even away from the strong coupling limit.
Wed, 2017-06-07 16:15
Equilibrium configurations of normal matter with parametric transition to black holes
Prof. Dr. Meinel
Tue, 2017-05-30 16:15(SR 5, Helmholtzweg 4)
Challenges for Cosmological Simulations
Dr. Klaus Dolag
(Universitäts-Sternwarte München, Max-Planck-Institute für Astrophysik Garching)
Tue, 2017-05-30 12:00(HS 5 Abbeanum)
Die Formfaktoren des Quark-Photon Vertex
Milena Leutnant, FSU Jena
(Verteidigung der Masterarbeit)
Mon, 2017-05-29 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Exploring the high-energy Universe
Prof. Dr. Stefan Funk
Friedrich-Alexander Universität Erlangen-Nürnberg
Mon, 2017-05-29 16:00(SR 5, Helmholtzweg 4)
Gravitational Waveform modeling: Phenomenological models
Prof. Mark Hannam,
Cardiff university, Cardiff, U.K.
Mon, 2017-05-22 18:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Nanotribologie: Reibung (und mehr) auf atomarer Ebene
Prof. Dr. Enrico Gnecco
Otto-Schott-Institut für Materialforschung
Thu, 2017-05-18 14:15
Baryons as relativistic three-quark bound states
Dr. Gernot Eichmann
(Uni Lissabon)
Tue, 2017-05-16 16:15(SR 5, Helmholtzweg 4)
QCD's correlation functions and their relevance for hadron physics
Gernot Eichmann (University of Lisbon)

I will use the baryon spectrum as a motivation to give a brief introduction to Dyson-Schwinger equations, which are nonperturbative tools to determine the n-point functions of QCD. I will discuss some examples for the quark and gluon propagators, the quark-gluon vertex and three-gluon vertex. In combination with Bethe-Salpeter equations, these methods allow one to calculate hadron properties such as their masses, form factors and scattering amplitudes.
Mon, 2017-05-15 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Max Wien - ein politischer Physiker zwischen Grundlagenforschung und Technik
Dr. Stefan Wolff
Deutsches Museum München
Thu, 2017-05-11 14:15
Decoupling of the charm quark
Prof. Dr. Francesco Knechtli
(Bergische Universität Wuppertal)
Tue, 2017-05-09 16:15(SR 5, Helmholtzweg 4)
Shnol type Theorem for the Agmon ground state
Dr. Siegfried Beckus (Technion Haifa)

The celebrated Shnol theorem 4 asserts that every polynomially bounded generalized eigenfunction for a given energy E∈R associated with a Schrödinger operator H implies that E is in the L2-spectrum of H. Later Simon 5 rediscorvered this result independently and proved additionally that the set of energies admitting a polynomially bounded generalized eigenfunction is dense in the spectrum. A remarkable extension of these results hold also in the Dirichlet setting 1, 2.
It was conjectured in 3 that the polynomial bound on the generalized eigenfunction can be replaced by an object intrinsically defined by H, namely, the Agmon ground state. During the talk, we positively answer the conjecture indicating that the Agmon ground state describes the spectrum of the operator H. Specifically, we show that if u is a generalized eigenfunction for the eigenvalue E∈R that is bounded by the Agmon ground state then E belongs to the L2-spectrum of H. Furthermore, this assertion extends to the Dirichlet setting whenever a suitable notion of Agmon ground state is available.

1 A. Boutet de Monvel, D. Lenz, and P. Stollmann, Sch'nol's theorem for strongly local forms, 189-211, Israel J. Math., vol. 173, 2009.
2 A. Boutet de Monvel and P. Stollmann, Eigenfunction expansions for generators of Dirichlet forms, 131-144, J. Reine Angew. Math. vol. 561, 2003.
3 B. Devyver, M. Fraas, and Y. Pinchover, Optimal Hardy weight for second-order elliptic operator: an answer to a problem of Agmon, 4422-4489, J. Funct. Anal., vol. 266, no. 7, 2014.
4 È. È. Šhnol', On the behavior of the eigenfunctions of Schrödinger's equation, 273-286, Mat. Sb. (N.S.), vol. 42, (84), 1957; erratum, 259, vol. 46, (88), 1957 (Russian).
5 B. Simon, Spectrum and continuum eigenfunctions of Schrödinger operators, 347-355, J. Funct. Anal., vol. 42, no. 3, 1981.
Mon, 2017-05-08 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Gasspektroskopie unter Hochdruck-/Hochtemperaturbedingungen
Dr. Roland Ackermann
Institut für Angewandte Physik
Tue, 2017-04-25 16:15(SR 5, Helmholtzweg 4)
Simulating Generic Binary Neutron Star Mergers
Dr. Tim Dietrich
(Max Planck Institut for Gravitational Physics, Potsdam)
Mon, 2017-04-24 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
event without name
Prof. Dr. Hardy Gross
MPI Halle (Saale)
Thu, 2017-04-20 14:15
Signatures of axial anomaly in real-time evolution of quantum chiral plasma
Dr. Pavel Buividovich
(Uni Regensburg)
Mon, 2017-04-10 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Laser als universelles Werkzeug zur Synthese, Bearbeitung und Funktionalisierung von Werkstoffen
Dr. Stephan Gräf
Otto-Schott-Institut für Materialforschung
Fri, 2017-03-17 14:00
Master-Verteidigung: Weltliniennumerik auf moderner Rechnerarchitektur
Sabrina Kaack (FSU Jena)
Wed, 2017-02-08 17:00(HS 2, Helmholtzweg 5)
Disputation: Signaturen des Quantenvakuums in inhomogenen elektromagnetischen Feldern
Disputation of Nico Seegert
Tue, 2017-02-07 16:00(HS 2, Helmholtzweg 5)
Disputation: From Condensed matter to Higgs Physics - Solving Functional Renormalization Group Equations Globally in Field Space
Disputation of Julia Borchardt
Tue, 2017-01-31 12:00(HI Jena, Seminarraum, Fröbelstieg 3)
Theoretische Analyse der Vakuumdoppelbrechung im Feld eines Hochintensitätslasers
Chantal Sundqvist
Mon, 2017-01-30 17:15(HS 1, Abbeanum)
Habilitationsvorstellung: SUSY photonics - harnessing advanced symmetries for next-generation optical circuitry
Dr. Matthias Heinrich
Institut für Angewandt Physik, FSU Jena
Mon, 2017-01-30 10:15(SR 102, Abb.)
Looking for Beyond the Standard Model in Dark Matter
Prof. Veronica Sanz (University of Sussex)
Fri, 2017-01-27 14:30(HS 2, Abbeanum)
Towards Higher-Spin Gravity in non-AdS backgrounds
Masterverteidigung von Michel Pannier
Wed, 2017-01-25 16:15(HS 2, Abbeanum)
Ernst Mach and Machian effects in general relativity
Prof. Jiri Bicak, Charles University (Prague)

Abstract: I shall start with some remarks on Ernst Mach (1838-1916), who spent many years at the University in Prague and at the Vienna University. I briefly recall his and Einstein's ideas on the origin of inertia and their influence on the construction of general relativity. I mention the direct experiment verifying relativistic dragging/gravitomagnetic effects - the Gravity Probe B; the results were summarized only recently. I shall then turn to several specific general-relativistic problems illustrating the gravitomagnetic effects: the dragging of particles and fields around a rotating black hole, dragging inside a collapsing slowly rotating spherical shell of dust, linear dragging in a static situation, and the way how Mach's principle can be formulated in cosmology. A more detailed discussion will be devoted to the dragging effects by rotating gravitational waves.
Tue, 2017-01-24 16:15(SR 5, Helmholtzweg 4)
Non-equilibrium dynamics
Prof. Kehrein
Universität Göttingen
Mon, 2017-01-23 17:15(HS 1, Abbeanum)
Subzyklen-Quatenphysik der Elektronen und Photonen
Prof. Dr. Alfred Leitenstorfer
Universität Konstanz
Tue, 2017-01-17 16:15
Elementary considerations concerning the relation between quantum mechanics and gravity
Prof. N. Giulini
Universität Hannover
Fri, 2017-01-13 16:15(HS 2, Abbeanum)
Near-Horizon-Geometrien im Formalismus der Ernst-Gleichungen
Verteidigung der Masterarbeit von Sebastian Ulbricht
Wed, 2017-01-11 16:15(HS 2, Abbeanum)
Theory and Observation of Black-Hole Binaries
Frank Ohme (LIGO)

Abstract: Orbiting black-hole binaries emit gravitational waves. Details of these signals have been studied theoretically with ever increasing sophistication over decades, and with the breakthrough discovery of the Laser Interferometer Gravitational-wave Observatory (LIGO) in September 2015 we have gained access to direct measurements of black-hole mergers. In my talk, I will both summarise the observations LIGO has made in its first observing run and highlight the progress and challenges of theoretical models that play a crucial role in interpreting the experimental data.
Tue, 2017-01-10 16:15(SR 5, Helmholtzweg 4)
Black Holes in a Haystack: Search and Interpretation of Gravitational Waves
Frank Ohme (LIGO)

Abstract: Last year, the Laser Interferometer Gravitational-Wave Observatory (LIGO) announced the discovery of gravitational waves from black-hole binaries that collide in the most energetic collisions we have observed in the Universe so far. I will give an introduction to the analysis methods behind these great discoveries and show how theoretical models of gravitational-wave signals help us decipher weak spacetime oscillations that are buried in instrument noise.
Mon, 2017-01-09 17:15(HS 1, Abbeanum)
event without name
Prof. Dr. Wilfried Wurth
Deutsches Elektronen-Synchroton (DESY)
Tue, 2016-12-20 17:15(HS 2, Helmholtzweg 5)
Disputation: Behandlung supersymmetrischer Systeme mittels der funktionellen Renormierungsgruppe
Disputation of Tobias Hellwig
Tue, 2016-12-20 15:15
Real-time properties & transport in QCD
Talk by Prof. Dr. Jan M. Pawlowski, University of Heidelberg
Mon, 2016-12-19 17:15(HS 1, Abbeanum)
The Little Bang: the ALICE experiment at the CERN LHC
Prof. dr. Paolo Giubellino
GSI Darmstadt
Fri, 2016-12-09 16:15(HS 2, Abbeanum)
Gravitationskollaps einer Staubkugel
Verteidigung der Masterarbeit von Dorothee Tell
Mon, 2016-12-05 17:15(HS 1, Abbeanum)
Photoluminescence, Density of States and Solar Cells
Prof. Dr. Susanne Siebentritt
Universität Luxemburg
Tue, 2016-11-29 16:15(SR 5, Helmholtzweg 4)
Group field theory
Daniele Oriti
Mon, 2016-11-28 17:15(HS 1, Abbeanum)
Habilitationsvorstellung: Von Zufallszahlen zur Physik der Hadronen
Dr. André Sternbeck
Theoretisch-Physikalisches Institut, FSU Jena
Thu, 2016-11-24 17:15(HS 2, Helmholtzweg 5)
Disputation: Electron-Positron Paarproduktion in starken elektrischen Feldern
Disputation of Alexander Blinne: "Electron-Positron Paarproduktion in starken elektrischen Feldern"
Thu, 2016-11-24 14:15(SR 5, Helmholtzweg 4)
Holography at QCD-Tc
Prof. Burkhard Kämpfer (TU Dresden & HZDR)
Tue, 2016-11-22 16:15
Experiments to search light-weight, weakly coupled particles beyond the Standard Model
Dr. Babette Döbrich
An increasing number of experiments
is searching for new particle physics outside the range of high-energy colliders.
New particles could be hiding at comparably low mass
but very weak coupling and are hypothesized to explain Dark Matter.
In my talk I will introduce the motivation and search
for a selection of models. I will detail in particular
on ongoing searches at the NA62 experiment at CERN and the FUNK experiment at KIT.
Mon, 2016-11-21 17:15(HS 1, Abbeanum)
Habilitationsvorstellung: High-power Terahertz pulse trains from laserdriven particle accelerators
Dr. Amrutha Gopal
Institut für Optik und Quantenelektronik, FSU Jena
Thu, 2016-11-17 14:15
How general is holography?
Max Riegler (Unuiversite Libre de Bruxelles)
Mon, 2016-11-07 17:15(HS 1, Abbeanum)
Tomographie der Sonnenatmosphäre
Prof. Dr. Arnold Hanslmeier
Universität Graz
Fri, 2016-11-04 15:15(HS 2, Abbeanum)
Voruntersuchungen zur Simulation von Supersymmetrischen Gittereichtheorien
Marc Steinhauser
Fri, 2016-11-04 14:15(HS 2, Abbeanum)
Functional Renormalization Group Approach for the 3-Dimensional N=2 Wess-Zumino-Modell
Polina Feldmann (Jena)
Thu, 2016-11-03 14:15
Worldline Formalism and noncommutative QFT
Sebastián Franchino-Viñas (La Plata / TPI)

Abstract: The Worldline Formalism possesses great advantages in comparison
with a Feynman's diagram analysis of a quantum field theory. On the other
hand, noncommutative quantum field theories are probably one of the most
important candidates to be an effective theory of quantum gravity. We then
show how to implement the worldline formalism in noncommutative theories.
The result is a master formula for the 1-loop effective action that is
applied to a number of scalar models — among them the Grosse-Wulkenhaar
model a model with some unusually kind properties of renormalization. As a
byproduct we find an expression for the small propertime expansion of
general nonlocal operators' Heat Kernel.
Fri, 2016-10-28 16:00(HS 2, Abbeanum)
General Relativity Seminar
Henriette Wirth
Verteidigung Masterarbeit: "The Fully Pseudospectral Time Evolution of a Spherically Symmetric, Oscillating Newtonian Star Model"
Fri, 2016-10-28 14:30(HS 2, Abbeanum)
Interfaces in holographic Weyl semimetals
Masterverteidigung von Markus Heinrich
Thu, 2016-10-27 14:15(SR 5, Helmholtzweg 4)
Holography with momentum dissipation and massive gravity: a status report
Matteo Baggioli

I will review the state of the art of holographic homogeneous models without translational invariance.
Particular emphasis will be put on holographic massive gravity as an effective and efficient way of dissipating momentum
in the context of the gauge-gravity duality. After a broad introduction and motivation of the framework I will describe the phenomenological implications concerning charge and momentum transport of the CFT duals. I will finally analyze the possible existence of universal bounds on physical quantities and the description of strongly coupled insulators within this setup.

Wed, 2016-10-26 16:15
Wave equations in curved backgrounds: numerical applications to black-hole quasi-normal modes and AdS/CFT correspondence
Rodrigo Panosso Macedo (FSU Jena)

Abstract: We present a spectral representation of solutions to relativistic wave equations formulated on a Schwarzschild-black-hole background. We first consider an asymptotically flat spacetime and, after performing a Laplace transformation on the wave equation in question, we present an algorithm for obtaining all ingredients of the desired spectral decomposition, including quasi-normal modes, quasi-normal mode amplitudes as well as the jump of the Laplace-transform along the branch cut. The work explains extensively this procedure and includes detailed discussions of relevant aspects, such as the contribution of infinity frequencies modes to the early time response of the black hole and its relation to the QNM-amplitudes grow’s rate. In a second part, we employ the same strategy to study the solution of wave equations on an asymptotically AdS background. The system models the response of the chiral magnetic effect due to continuous quenches induced by time dependent electric fields via AdS/CFT correspondence and here, we focus on the possibility of considering the asymptotic growth rate of the amplitudes as a well defined notion of initial time scale for linearized systems.
Mon, 2016-10-24 18:00(Aula)
Festveranstaltung zur Verleihung der Heraeus Senior-Professur - Der Goldene Schnitt in der klassischen Physik
Prof. Dr. Karl-Heintz Lotze
Heraeus Senior-Professur
Thu, 2016-10-20 14:15
On low-energy effective actions in supersymmetric field models in three and six dimensions
Dr. Boris Merzlikin, University Tomsk, Russia
Wed, 2016-10-19 17:00(Rosensäle)
Einsteins Allgemeine Relativitätstheorie: Vom Alltag bis zu den neusten Entwicklungen
Prof. Dr. Gerhard Schäfer "Phänomene der allgemeinen Relativitätstheorie" aus der Sicht der Physik
Prof. Dr. Gerhard Huisken "Geometrie und Gravitation" aus der Sicht der Mathematik
Thu, 2016-10-13 14:15(SR 5, Helmholtzweg 4)
On low-energy effective actions in supersymmetric field models in three and six dimensions
Dr. Boris Merzlikin, University Tomsk, Russia

Talks from 2016-03-01 up to 2016-09-30
Wed, 2016-09-28 16:15(HS 2, Abbeanum)
Instabilities of Coulomb phases and quark confinement in QCD
Manuel Asorey, University of Zaragoza, Spain
Thu, 2016-09-08 14:15(SR 5, Helmholtzweg 4)
Convexity at finite temperature and non-extensive thermodynamics
Dr. Jean Alexandre (King's College London)
Wed, 2016-08-17 16:15
Astrophysical jets: a new numerical approach to force-free electrodynamics
Dr. Federico Carrasco (CONICET, Ciudad Universitaria Cordoba):

Force-Free Electrodynamics (FFE) is a non-linear system of equations modeling the evolution of the electromagnetic field in the presence of a magnetically dominated relativistic plasma. This configuration arises on several astrophysical scenarios of interest such as pulsars or active galactic nuclei. In this talk, I will present a new numerical implementation of FFE around a Kerr black hole, which reproduce standard results regarding jet formation and energy extraction by means of a truly stationary electromagnetic configuration.
The novelty of our approach is three-folded: i) We use the multi-block technique (1) to represent a domain with S2x R+ topology within a stable numerical scheme. ii) We employ as evolution equations those arising from a covariant hyperbolization of the FFE system (3), which we have developed using the generalized symmetric hyperbolic formalism of Geroch (2). iii) We implement stable and constraint-preserving
boundary conditions, which represents an outer region given by a uniform magnetic field aligned/misaligned with the symmetry axis.

(1) L. Lehner O. Reula and M. Tiglio, Multi-block simulations in general relativity: high order discretizations, numerical stability, and applications, Class.Quant.Grav. 22 (2005), 5283-5322.
(2) R. Geroch, Partial di erential equations of physics, General Relativity, Aberdeen, Scotland (1996), 19-60.
(3) F. Carrasco and O. Reula, Covariant hyperbolization of force-free electrodynamics, Physical Review D 93 (2016), no. 8, 085013.
Thu, 2016-07-14 14:15(SR 5, Helmholtzweg 4)
DC conductivities in Holography
Luis Melgar
Imperial College London
Wed, 2016-07-13 14:15(HS 2, Abbeanum)
Properties of Higher Spin Black Holes from CFT
Benjamin Hinrichs
Thu, 2016-07-07 14:15(SR 5, Helmholtzweg 4)
Heavy mesons and tetraquarks from lattice QCD
Prof. Dr. Marc Wagner, Univ. Frankfurt
Wed, 2016-07-06 16:15
Numbers and functions in quantum field theory
Dr. Oliver Schnetz, Univ. Erlangen

Quantum field theories describe the fundamental interactions between physical particles. Perturbation theory organizes quantum field theory calculations as expansions in Feynman graphs. Each Feynman graph stands for a multi-dimensional integral over a differential form which is a rational function with integer coefficients. We report on the mathematical structures of the numbers and functions which arise from these integrals. We also indicate how these structures can be used to perform (some) quantum field theory calculations to very high order.
Tue, 2016-07-05 16:15
Illuminating the dark side: new approaches to search for the dominating matter in our universe.
Dr. Axel Lindner
DESY Hamburg
Fri, 2016-07-01 16:15
Tue, 2016-06-28 16:15(SR 5, Helmholtzweg 4)
Non-commutative quasicrystals II
Felix Pogorzelski, Technion Haifa, Israel


This is a continuation of last week's talk of quasicrystals in possibly non-commutative lcsc groups. We introduce the notion of Gelfand pairs which are a powerful tool to develop a spherical Fourier theory on the spaces we have in mind. The corresponding abstract Fourier transform allows us to define the spherical diffraction measure for non-commutative quasicrystals. Generalizing the classical (abelian) case, we explain why regular cut-and-project sets arising from cocompact lattices amount to pure point diffraction. Joint work with Michael Björklund and Tobias Hartnick.
Tue, 2016-06-28 14:15(Seminarraum HI Jena, Fröbelstieg 3)
Beyond the Standard Model (of High-Intensity Laser Particle Interactions)
Prof. Thomas Heinzl (Plymouth University)

The interaction of matter with high-intensity lasers is traditionally described by modelling the laser as a plane wave background field. This description becomes invalid (i) at ultra-high intensities requiring strong focussing and (ii) whenever there is substantial back-reaction on the external field yielding e.g. beam depletion. I will describe a number of theoretical attempts aimed at improving the current methodology to deal with these rather extreme, but soon experimentally feasible, conditions.
Mon, 2016-06-27 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Habilitationsvorstellung: Tailoring Light Fields with Silicon Hygens' Metasurfaces
Dr. Isabelle Staude, Abbe Center of Photonics, FSU Jena
Wed, 2016-06-22 17:00(Hörsaal 1, Max-Wien-Platz)
Physik in Hollywood
Dr. Sascha Vogel (Fias Frankfurt)

Funktionieren Laserschwerter wirklich?
Wieso gewinnt James Bond immer & was hat Spiderman mit Physik zu tun?
Tue, 2016-06-21 16:15(SR 5, Helmholtzweg 4)
Non-commutative quasicrystals I
Felix Pogorzelski, Technion Haifa, Israel


The investigation of aperiodic point sets originates back to work of Meyer in the 70ies who pursued harmonic analysis on harmonious sets in Euclidean space. Shechtman's discovery of physical quasicrystals (1982) via laser experiments diffraction) triggered a boom of the mathematical analysis of the arising scatter patterns. In recent work with Michael Björklund and Tobias Hartnick, we developed a spherical diffraction theory for cut-and-project sets in general lcsc groups, thus advancing into the non-commutative world. This seminar aims at describing these non-commutative quasicrystals, as well as the dynamical systems which naturally arise from them. We explain further how to use these tools in order to derive the existence and the approximation of the autocorrelation measure.
Mon, 2016-06-20 17:15(HS 1, Abbeanum)
Die Variabilität natürlicher NiTi-Oberflächen
Dr. Andreas Undisz (Otto-Schott-Institut für Materialforschung)
Thu, 2016-06-16 14:15
Center-symmetric perturbative expansion of SU(N) gauge theory
Prof. M. Schaden (Rutgers University)
Wed, 2016-06-15 16:15(HS 2, Abbeanum)
The cross-correlation search for stochastic and continuous gravitational wave sources
Prof. Sanjeev Dhurandhar


The cross-correlation search can be used to map the stochastic gravitational wave (GW) background, as well as track continuous wave sources such as spinning neutron stars. An astrophysical GW background will likely arise from an incoherent superposition of unmodelled and/or unresolved sources and cosmological GWbackgrounds (CGWB) are also predicted in certain scenarios. The basic statistic used is the cross-correlation between the data from a pair of detectors. In order to ‘point’ the pair of detectors at different locations one must suitably delay the signal by the amount it takes for the GW to travel to both detectors corresponding to a source direction. Then the raw sky map of the GW background is the signal convolved with a beam response function that varies with location in the sky. The true sky map is obtained by numerically deconvolving the beam function in the integral (convolution) equation by using the maximum likelihood approach. We apply these methods to the Virgo cluster which could be "hot spot" of stochastic GW originating from rotating neutron stars which is a suitable source for this method. We then show how this method can be adapted to observe continuous wave sources such as spinning neutron stars. This method can be used as a trade-off between computational cost and sensitivity. This method can also be employed for LMXB searches such as Sco X-1. Work on how to speed up the searches is in progress.
Thu, 2016-06-09 14:15
From three-dimensional Yang-Mills theory to QCD
Dr. Markus Huber (Graz U.)
Wed, 2016-06-08 16:15(HS 2, Abbeanum)
Dual Foliation Formulations of General Relativity
or "how I learned to stop worrying and love coordinates"

by Dr. David Hilditch, TPI Jena

Abstract: When solving general relativity numerically for a given physical problem we must use a formulation of the field equations for which the resulting partial differential equation problem is well-posed. Building such a good formulation usually requires making a coordinate choice. This leads to the standard statement that `gauge freedom in general relativity is the choice of coordinates'. The
latter two facts have long bothered me, because one of the first lessons in relativity is that coordinates should in some sense not matter. In my talk I will explain the solution to my earlier confusion. Time permitting I will also describe ongoing work to exploit the solution for practical calculations.

Tue, 2016-06-07 16:15(SR 5, Helmholtzweg 4)
Constraints as evolutionary systems
Prof. Racz

In this talk the constraint equations for smooth spaces satisfying Einstein's equations will be considered. It is shown that, regardless whether the primary space is Riemannian or Lorentzian, the constraints can always be put into the form of an evolutionary system comprised either by a first order symmetric hyperbolic system and a parabolic equation or, alternatively, by a strongly hyperbolic system subsided by an algebraic relation. The (local) existence and uniqueness of solutions to these evolutionary systems is also shown verifying thereby that the proposed evolutionary approach provides a viable alternative to the apparently unique conformal method.
Fri, 2016-06-03 16:15(HS 2, Abbeanum)
Surrogate models of gravitational waveforms from numerical relativity simulations of binary black hole mergers
Jonathan Blackman, Caltech

GW150914 was the first detection of gravitational waves from a binary black hole merger, bringing us into the era of gravitational wave astronomy. From such gravitational wave detections, we can put constraints on deviations from general relativity (GR), as well as measure the masses and spins of the black holes involved in the merger. Such measurements require knowledge of the gravitational waveforms predicted by GR for all relevant masses and spins. Numerical relativity (NR) simulations are now sufficiently robust that we can accurately simulate binary black hole mergers and obtain the waveform for all but the most extreme parameters, but they are too computationally expensive for a dense coverage of the parameter space. The effective-one-body model and phenomenological waveform models agree well with NR for the parameters of GW150914, but could be insufficiently accurate for estimating the parameters of a loud gravitational wave detection in other regions of the parameter space. NR surrogate models attempt to rapidly and accurately interpolate the waveforms from a set of NR simulations over a subset of parameter space. Using the Spectral Einstein Code (SpEC), we have built NR surrogate models for non-spinning binaries with mass ratios up to 10, and for spinning precessing binaries with a restricted spin direction on the smaller black hole. They typically perform an order of magnitude better than other waveform models when compared to NR waveforms which were not included in the surrogate training set, and can be used in gravitational wave parameter estimation.
Wed, 2016-06-01 16:15(HS 2, Abbeanum)
Heavy dense QCD from an effective lattice theory
Prof. Owe Philipsen (Uni Frankfurt)
Wed, 2016-05-25 16:15
QCD phenomenology and hadron physics from supercomputers
Dr. Andre Sternbeck, TPI Jena
Mon, 2016-05-23 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Prof. Dr. Christian Eggeling, Univ. of Oxford
Thu, 2016-05-19 14:15(SR 5, Helmholtzweg 4)
Causal Space-time on a Null Lattice
Prof. Dr. Martin Schaden, Rutgers University

Abstract: I propose a discrete model of Quantum Gravity based on the same principle as the Global Positioning System: the intersection of forward light-cones from four spatially separate events (with some restrictions) determines another event. I show that a causal manifold can thus be described by a topologically hypercubic lattice with light-like links; the length of the spatial diagonal of each plaquette being determined by spinors describing the light-like edges. This lattice model has an SL(2,C) x U^4(1) structure group and is geometric. The description foliates in a causal and physically transparent manner. The observables, the most general local action and the integration measure of this model are all determined by this stucture group and for smooth configurations have well-known continuum limits. Consistency constraints on a configuration to describe a causal manifold are derived and a one-parameter ambiguity of the invariant integration measure is exploited to regularize the model. Finally the SL(2,C) structure group is uniquely localized and the integration measure expressed in terms of geometric invariants. Should time and interest permit, I will also discuss global issues and show numerical results on a small lattice describing the vicinity of the Big Bang in the (unphysical) limit where the cosmological term dominates the dynamics.
Tue, 2016-05-17 16:15(SR 5, Helmholtzweg 4)
Quantum gravity aspects of black holes
Prof. Ammon
Fri, 2016-05-13 10:30(SR 5, Helmholtzweg 4)
Duality between higher spin gravity in (Anti-)deSitter spacetime and conformal field theories

Attila Lüttmerding
Thu, 2016-05-12 14:15
Spontaneous breaking of Lorentz symmetry in QED3
Dr. Lukas Janssen (TU Dresden)

Abstract: The phase diagram of quantum electrodynamics in three space-time dimensions as a function of fermion flavor number N exhibits two well-known phases: at large N > Nc1 the system is in a conformal gapless state, while for small N < Nc2 the fermions are expected to develop a dynamical mass due to spontaneous chiral symmetry breaking. Using epsilon expansion near the lower critical dimension of two, in combination with the recent results on the generalization of the F theorem to continuous dimension, we show that Nc1 > Nc2. There is therefore an intermediate range of values of N at which a third phase is stabilized. We demonstrate that this phase is characterized by spontaneous breaking of Lorentz symmetry, in which a composite vector boson field acquires a vacuum expectation value with the fermions and the photon remaining massless.
Wed, 2016-05-11 16:15(HS 2, Abbeanum)
Nonequilibrium entropy production for open quantum systems
Prof. Eric Lutz (FAU Erlangen)


Entropy production is a fundamental quantity of nonequilibrium thermodynamics. We here discuss exact microscopic expressions for the nonequilibrium entropy production of closed and open quantum systems that are driven arbitrarily far from equilibrium, in particular beyond the linear response regime. We additionally consider the entropy production rate, which provides information about the speed of nonequilibrium processes, and show that they are bounded from above for quantum systems. The connection with the notion of quantum speed limit is addressed.
Wed, 2016-05-04 14:30
Quasinormal modes in holographic s-wave superconductors

von Johanna Mader
Tue, 2016-05-03 16:15(SR 5, HHW 4)
Hawking Radiation
Prof. Dr. Andreas Wipf, TPI Jena
Mon, 2016-05-02 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Wie entstanden die ersten festen Körper im jungen Sonnensystem?
Prof. Dr. Jürgen Blum, TU Braunschweig
Wed, 2016-04-27 16:15
Nonlinear evolution of perturbed anti-de Sitter spacetime
Dr. Piotr Bizon (Krakow)

Abstract: Dynamics of asymptotically AdS spacetimes is an interesting meeting point of fundamental problems in general relativity, PDE theory, theory of turbulence, and AdS/CFT correspondence. In my talk I will describe recent progress in understanding this problem, focusing on evidence for the instability of AdS spacetime.
Tue, 2016-04-26 17:15(HS 2, Helmholtzweg 5)
Disputation "Untersuchungen von rotierenden und geladenen Staubscheiben mit hochgenauen Näherungslösungen und der Grenzübergang zu Schwarzen Löchern"
Disputation of Martin Breithaupt
Tue, 2016-04-26 14:30(SR 5, Helmholtzweg 4)
Thermodynamics of higher spin black holes
Tim Nitzsche

Thu, 2016-04-21 16:00(Hörsaal 9, Carl-Zeiß-Str. 3)
Magnetic Vortices, vortex lattices and automorphic functions
Prof. Dr. Israel Michael Sigal, Univ. Toronto

I will review recent results concerning the Ginzburg - Landau equations. These equations were first developed to understand macroscopic behaviour of superconductors; later, together with their non-Abelian generalizations - the Yang-Mills-Higgs equations, they became a key part of the standard model in elementary particle physics. They also have found important applications in geometry and topology.

The Ginzburg - Landau equations have remarkable solutions, localized topological solitons, called the magnetic vortices in the superconductivity and the Nielsen-Olesen or Nambu strings in the particle physics, as well as extended ones, magnetic vortex lattices.

I will review the existence and stability theory of the vortex lattice solutions and how they relate to the modified theta functions appearing in number theory and algebraic geometry. Certain automorphic functions play a key role in the theory described in the talk.
Thu, 2016-04-21 14:15(SR 5, Helmholtzweg 4)
Critical scaling in the Large-N O(N) model and its possible connection to quantum gravity
Dr. Péter Mati (Budapest/Szeged)

The critical scaling of the large-N O(N) model in higher dimensions using the exact renormalization group equations will be discussed. Particular attention is paid to the case of d=5 where the scaling exponent of the correlation length has the value 1/3, which coincides with the scaling exponent of quantum gravity in one fewer dimensions. Convincing results show that this relation could be generalized to arbitrary number of dimensions above five. Some aspects of AdS/CFT correspondence will be also discussed.
Wed, 2016-04-20 10:15(HI Jena, Fröbelstieg 3)
QED in the infrared
Dr. Péter Mati (Budapest/Szeged)
Joint Seminar with Helmholtz Institute Jena

Infrared (IR) singularities in massless gauge theories are known since the foundation of quantum field theories. The root of this problem can be tracked back to the very definition of these long-range interacting theories such as QED. The IR catastrophe and its resolution by cancelling the divergences will be discussed. The Bloch-Nordsieck model provides the deep IR description of QED, and in its framework all the radiative corrections to the electron propagator can be fully summed, giving the infra-particle interpretation to the electron. This solution can be obtained by using the functional technique based on the Schwinger-Dyson equation with the aid of the Ward-Takahashi identities. At finite temperatures we use the Keldysh description, that will give a matrix structure to the equation. Again an analytic solution can be obtained for the exact spectral function. The finite temperature solution provides a natural explanation of IR finiteness.
Tue, 2016-04-19 16:15(SR 5, Helmholtzweg 4)
Thermodynamics in GR
Prof. Dr. Gernot Neugebauer, TPI Jena
Mon, 2016-04-11 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Habilitationsvorstellung: Verdrilltes Licht: Physik und Anwendungen
Dr. Marco Ornigotti, Institut für Angewandte Physik, FSU Jena
Thu, 2016-04-07 14:30(SR 5, Helmholtzweg 4)
Verteidigung Masterarbeit
Birger Böning
Mon, 2016-04-04 17:15(HS 1, Abbeanum)
First Observation of Gravitational Waves from a Binary Black Hole Merger
Prof. Dr. Bernd Brügmann, FSU Jena
Fri, 2016-03-11 16:15
Collapse of the Brill waves in a moving-puncture-like gauge (WIP)
Anton Khirnov


One of the open problems in numerical relativity is that of the critical collapse of gravitational waves into a black hole. Quite interestingly, it has been discovered that the supercritical Brill waves, a commonly used family of initial data, cannot be successfully evolved with the moving puncture gauge, popular for black hole simulations. In this talk, we present our work in progress on using a modification of the moving puncture gauge to evolve such data.
Fri, 2016-03-04 16:15(HS 2, Abbeanum)
Verteidigung der Masterarbeit
Anika Dathe

Talks from 2015-10-01 up to 2016-02-29
Thu, 2016-02-11 16:15(SR 5, Helmholtzweg 4)
The fate of Halpern-Huang directions
Dr. Alfio Bonanno (INAF, Catania)
Wed, 2016-02-10 14:15
Cosmological Implications of Quantum Quadratic Gravity
Dr. Alfio Bonanno (INFN Catania)
Mon, 2016-02-08 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Habilitationsvorstellung: Optische Signaturen des Quantenvakuums in starken elektromagnetischen Feldern
Dr. Felix Karbstein, FSU Jena
Thu, 2016-02-04 14:15
Nonperturbative renormalization group flow for scalar fields in de Sitter space
Dr. Maxime Guilleux, Univesite Paris Diderot
Wed, 2016-02-03 16:15
Thu, 2016-01-28 14:15
Phase diagram of an asymptotically free model through lattice dualization
Dr. Falk Bruckmann, Universität Regensburg
Wed, 2016-01-27 16:15(HS 2, Abbeanum)
Numerics and Astrophysics of Neutron Stars
Prof. Stephan Rosswog, Universität Stockholm
Tue, 2016-01-26 16:15(SR 5, Helmholtzweg 4)
Dr. Javier Rubio, Heidelberg
Mon, 2016-01-25 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Wie könnte man die Gravitation beeinflussen?
Prof. Dr. Martin Tajmar, TU Dresden
Thu, 2016-01-21 14:00
Higgs inflation and the cosmological frame debate
Dr. Christian Steinwachs, Universität Freiburg
Wed, 2016-01-20 16:15(HS 2, Abbeanum)
Binary Black holes: Numerical simulations and their applications
Prof. Harald Pfeiffer, Canadian Institute of Theoretical Astrophyiscs, University of Toronto
Thu, 2016-01-14 14:15
Worldsheet string theory in AdS/CFT: perturbation theory and beyond
Dr. Valentina Forini, HU Berlin

Abstract: It is discussed how the integrable structure underlying the AdS/CFT system and the cross-fertilization of established field-theretical tools to strings can be used to enhance our knowledge on
the string sigma model and thus the predictivity of the duality.
Tue, 2016-01-12 16:15
Monte Carlo Methods for Approximation Problems
Robert Kunsch
Mon, 2016-01-11 18:00(Aula der FSU)
Antrittsvorlesung: Predicting new materials and their properties with supercomputing
Prof. Dr. Silvana Botti, FSU Jena
Wed, 2016-01-06 16:15(HS 2, Abbeanum)
Conformal properties of the Schwarzschild-de Sitter spacetime
Dr. Juan Valiente-Kroon, School of Mathematical Sciences at Queen Mary, University of London

In this talk I will show how the asymptotic initial value problem for the conformal Einstein field equations, whereby one prescribes initial data on a spacelike hypersurface representing the conformal boundary, can be used to study various conformal aspects of the Schwarzschild-de Sitter spacetime. The analysis presented covers the subextremal, extremal and hyperextremal cases. The implications of this analysis for the study of nonlinear perturbations of members of the Schwarzschild-de Sitter family of spacetimes are discussed.
Tue, 2016-01-05 16:15(SR 5, Helmholtzweg 4)
Introduction to Information-Based Complexity (IBC)
Robert Kunsch
Fri, 2015-12-18 16:15
Lösung axialsymmetrischer Wellengleichungen in der Kerr-Metrik durch eine Laplacetransformations-Methode
Verteidigung der Masterarbeit
Jörg Dommaschk, FSU Jena
Thu, 2015-12-17 14:15
Maximally supersymmetric Yang--Mills-Theory on the lattice
Dr. David Schaich
Syracuse University
Wed, 2015-12-16 16:15(HS 2, Abbeanum)
Dr. Omar Zanusso (TPI, FSU Jena)
Thu, 2015-12-10 14:00
A holographic phase diagram of QCD and the critical point
Roman Yaresko (Helmholtz-Zentrum Dresden-Rossendorf)
Tue, 2015-12-08 16:15
From spectral functions to viscosity in the Quark-Gluon Plasma
Dr. Nicolai Christiansen, Universität Heidelberg
Mon, 2015-12-07 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Cosmic Matter in the Laboratory
Prof. Dr. Horst Stöcker, Universität Frankfurt
Fri, 2015-12-04 16:15(HS 2, Abbeanum)
Nichtlineare Wechselwirkungen ebener Gravitationswellen
Verteidigung der Masterarbeit von Marco Vockert
Thu, 2015-12-03 14:15(SR 5, Helmholtzweg 4)
The Overlap Dirac operator and its Application to the Quark Sector of QCD in Coulomb Gauge
Dr. Markus Pak (Uni Graz)
Fri, 2015-11-27 16:15
A New ADER-DG Scheme based on a Local Continuous Runge-Kutta Method
Verteidigung der Masterarbeit
Matthias Pilz, FSU Jena
Tue, 2015-11-24 16:15(SR 5, Helmholtzweg 4)
Towards quasicrystals in non-commutative spaces
Felix Pogorzelski


In 2011, Dan Shechtman was awarded the Nobel prize in chemistry for his discovery of physical quasicrystals. Via diffraction experiments, he observed in 1982 that for some materials, there are interference patterns whose symmetries are not compatible with crystallographic structures in three-dimensional space. This triggered the mathematical examination of those structures as Dirac combs over uniformly discrete point sets in Euclidean space.
In the past decades, mathematical diffraction theory evolved into a beautiful and rich research topic combining various disciplines such as functional analysis, fourier analysis and dynamical systems. One method to obtain a large class of interesting quasicrystals is via so-called cut-and-project schemes, introduced by Meyer in the 70s. This talk presents the basics of diffraction for cut-and-project schemes over locally compact abelian groups and describes how the theory can be extended to the non-commutative case.
This is joint work with Michael Björklund (Chalmers Göteborg) and
Tobias Hartnick (Technion Haifa).
Mon, 2015-11-23 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Carrier lifetime and diffusion constant: How to determine solar Cell material Proberties by time-resolved photoluminescence
Prof. Dr. Roland Scheer, MLU Halle-Wittenberg
Thu, 2015-11-19 14:15
Entanglement entropy in a holographic model of the Kondo effect
Mario Flory
MPI Munich

Starting from a holographic model a magnetic impurity interacting with a strongly coupled system, I focus on the challenges of computing gravitational backreaction in this model, which demands a study of the Israel junction conditions. I present general results on these junction conditions which may be relevant more generally in the AdS/boundary CFT correspondence. Furthermore, similar junction conditions for a bulk Chern-Simons field appearing in the holographic Kondo model are discussed. I then focus on the computation and interpretation of entanglement entropy in the holographic Kondo model. The holographic g-theorem will be discussed as well as a geometric construction that allows to reproduce results obtained by conformal perturbation theory on the boundary.
Wed, 2015-11-18 16:15(HS 2, Abbeanum)
Theoretical spectroscopy: how to calculate electronic excitations of materials from first-principles
Prof. Silvana Botti, FSU Jena
Tue, 2015-11-17 16:15(SR 5, Helmholtzweg 4)
Conformal Field Theory
Prof. Martin Ammon
Fri, 2015-11-13 10:15(SR 2, HHW 5 (gelbes Haus))
Atomic Quantum Simulation of Abelian and non-Abelian Gauge Theories (II)
Prof. Wiese
Thu, 2015-11-12 16:15(SR 5, HHW 4)
Atomic Quantum Simulation of Abelian and non-Abelian Gauge Theories (I)
Prof. Wiese
Tue, 2015-11-10 16:15(SR 5, Helmholtzweg 4)
Conformal Field Theory
Prof. Martin Ammon
Mon, 2015-11-09 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Von seinen eigentlichen künstlerischen Leistungen wissen wir wenig. - Der Architekt Ernst Neufert und das Abbeanum in Jena
Dip.-Ing. Udo Gleim, TU Darmstadt
Thu, 2015-11-05 17:00
Prof. Dr. Anne L'Huillier, Universität Lund (Schweden)

HS 1, Max-Wien-Platz
Tue, 2015-11-03 16:15(SR 5, Helmholtzweg 4)
Conformal Field Theory
Prof. Martin Ammon
Thu, 2015-10-29 14:15
Massless modes and Spontaneous Symmetry Breaking in QFT and Holography
Dr. Amadeo Jimenez Alba
FSU Jena
Wed, 2015-10-28 16:15(HS 2, Abbeanum)
Constructing interacting QFTs via OPEs
Dr. Markus Fröb, Universität Leipzig

Abstract: I will review a new approach to constructing interacting (Euclidean) QFTs in 4 dimensions via the operator product expansion (OPE), and a number of important results that have been proven in the last years using the Polchinski-Kopper flow equation framework, such as existence, convergence and factorisation properties of the OPE in a perturbative sense for non-gauge theories. Lastly, I present on-going work on the generalisation to gauge theories.
Mon, 2015-10-26 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
100 Jahre Forschung zur allgemeinen Relativitätstheorie (Physikalisches Kolloquium anläßlich des 75. Geburtstages von Prof. Dr. Gernot Neugebauer)
Prof. Dr. Hubert Goenner, Universität Göttingen

Zusammenfassung: Nach einer kurzen Einführung in die Allgemeine Relativitätstheorie gibt der Vortrag eine historisch-chronologisch angeordnete Übersicht über die Forschung seit Einsteins Publikation von 1915 und eine Auswahl der beteiligten Personen. Die aus der Theorie folgenden beobachtbaren Effekte, durch die die Theorie eindrucksvoll bestätigt wurde, werden ausführlich besprochen ebenso wie zukünftige geplante Messungen. Die Frage, ob es es "eine goldene Periode" der Gravitationsforschung gegeben hat, wird zum Schluss kommentiert.
Thu, 2015-10-22 14:15(SR 5, Helmholtzweg 4)
Nucleon structure from Lattice QCD at nearly physical quark masses
Dr. Andre Sternbeck
Tue, 2015-10-20 16:15(SR 5, Helmholtzweg 4)
Introduction to Lattice QCD
Dr. Andre Sternbeck

Talks from 2015-03-01 up to 2015-09-30
Tue, 2015-09-01 16:15(SR 5, Helmholtzweg 4)
Multicritical Point and Competing Orders of Graphene's Dirac Electrons
Laura Classen, Heidelberg
Tue, 2015-07-21 16:15(SR 5, Helmholtzweg 4)
Invariant classification and limits of superintegrable systems
Dr. Jonathan Kress, University of New South Wales (Sydney)

A classical Hamiltonian system possessing more globally defined conserved quantities than degrees of freedom is said to be superintegrable. Such systems possessing the maximum number of conserved quantities quadratic in the momenta have been much studied because of their connection with separation of variables and special functions. In two dimensions it has been shown that singular limits between `non-degenerate' superintegrable systems mirror limits between othogonal polynomials in the Askey scheme. As a first step in extending this to higher dimensions, all second order superintegrable systems with a `non-degenerate' potential have recently been classified and shown to arise by singular limits from a generic system on the 3-sphere. This classification and the relationships between the systems, which is joint work with Joshua Capel and Sarah Post, will be discussed.
Thu, 2015-07-16 14:15(SR 5, Helmholtzweg 4)
Gauge Theory of the (infinite-dimensional) Translation Group and Gravitation
Dr. Christian Wiesendanger, Zurich
Short Abstract: The seminar will address two interrelated questions:
- What if inertial and gravitational masses would differ off the mass shell? Could this be the basis of a theory of gravitation?
- Can gauge theories of infinite-dimensional gauge groups (example is the 4-dim Translation Group) be mathematically consistently defined so that the classical gauge field Hamiltonian is positive-definite and the quantum theory renormalizable?
Fri, 2015-07-10 16:15(HS 2, Abbeanum)
Finite differencing schemes for GLM-RMHD (Master Thesis Defense)
by Tom Dörffel
A class of finite differencing high-resolution shock-capturing methods for special relativistic magnetohydrodynamics is presented. The divergence condition is controlled by the divergence cleaning approach of Dedner (2002). By performing a series of standard tests the schemes are proven to be high-order accurate for smooth solution and stable in the case of strong shocks.
Tue, 2015-07-07 16:15(SR 5, Helmholtzweg 4)
On the phase structure of imbalanced fermionic systems
Dr. Tina Herbst, ITP Heidelberg
Tue, 2015-06-30 16:15
QCD effective potential with strong magnetic fields
Dr. Sho Osaki (KEK, Japan)
Mon, 2015-06-29 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Die Neudefinition des Kilogramm: Aktueller Stand und mögliche Auswirkungen auf die Darstellung und Weitergabe der Einheit
Dr. Michael Borys, Physikalisch-Technische Bundesanstalt
Tue, 2015-06-23 16:15(SR 5, Helmholtzweg 4)
Exploring some elliptic operators in Gravitation and Physical Oceanography
Dr. Jose Luis Jaramillo, Universität Brest

We discuss two physical problems in which the study of
the spectral properties of certain elliptic operators,
related to the Laplace-Beltrami operator on compact
Riemannian manifolds, appear naturally. The first problem
dwells in a gravitational context, namely the stability of
black hole apparent horizons, and addresses the properties
of a non-selfadjoint elliptic operator defined on closed
codimension-2 surfaces. The second problem deals with the
slow motions in the ocean and brings about the discussion of
the Laplace-Beltrami operator associated with an effective metric
in the oceanic basic, namely a compact manifold with boundaries.
The two problems are technically and conceptually related, in
particular through the spectral approach we adopt for their study.
The main goal in this talk is to present a brainstorm exercise
aiming at identifying the most suited mathematical strategy
for these problems.
Thu, 2015-06-18 14:15(SR 5, Helmholtzweg 4)
How much nonperturbative is the nonperturbative regime of QCD?
Dr. Matthieu Tissier,
LPTMC (Laboratoire de Physique Théorique de la Matière Condensée),
Université Pierre et Marie Curie, Paris.


Studying the high energy regime of QCD is a problem that can be tackled by perturbation theory. This is a consequence of asymptotic freedom, which states that the coupling constant of QCD decreases when increasing the energy. The low energy regime (often called the "nonperturbative regime") is much more difficult to access, mainly because the standard perturbation theory is not applicable anymore.

Nonetheless, I will discuss the possibility of studying the low-energy regime of QCD perturbatively. The main idea is to perform perturbation theory not around the usual Faddeev-Popov action, but around a simple extension of the latter, known as the Curci-Ferrari model. I will discuss the properties of this model and present several 1-loop calculations 1) for correlation functions 2) for the phase diagram of QCD. Comparison with lattice data show that all these quantities can be reproduced with a precision of the order of 15-20%.
Mon, 2015-06-15 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Power and Magnet Applications of High Temperature Superconductors
Prof. Dr. Bernhard Holzapfel, Karlsruher Institut für Technologie
Thu, 2015-06-11 14:15(SR 5, Helmholtzweg 4)
On the Search for Inhomogeneous Phases in Fermionic Models
Dr. Felix Karbstein
Helmholtz-Institut Jena

We revisit the Gross-Neveu model with N fermion flavors in
1+1 dimensions and compute its phase diagram at finite
temperature and chemical potential in the large-N limit.
To this end, we double the number of fermion degrees of
freedom in a specific way which allows us to detect
inhomogeneous phases in an efficient manner. We show
analytically that this "fermion doubling trick" predicts
correctly the position of the boundary between the
chirally symmetric phase and the phase with broken chiral
symmetry. Most importantly, we find that the emergence of
an inhomogeneous ground state is predicted correctly. We
critically analyze our approach based on this trick and
discuss its applicability to other theories, such as
fermionic models in higher dimensions, where it may be
used to guide the search for inhomogeneous phases.
Thu, 2015-06-04 14:15(SR 5, Helmholtzweg 4)
Glueballs in the Dyson-Schwinger approach
Dr. Helios Sanchis Alepuz, Justus-Liebig Universität, Gießen
Tue, 2015-06-02 16:15(SR 5, Helmholtzweg 4)
The Topology of Chiral Vector Bundles (topological insulators of type AIII)
Dr. Giuseppe de Nittis, Friedrich-Alexander-Universität Erlangen-Nürnberg

The classification of topological states of matter is an important hot topic in mathematical physics. In this talk I will describe a new approach to the classification of topological quantum systems in class AIII which is based on the study of a new category of vector bundles. The objects of this category, the chiral vector bundles, are pairs constituted by a complex vector bundle along with one of its automorphisms. We provide a classification for the homotopy equivalence classes of these objects which is based on the construction of a suitable classifying space. The computation of the cohomology of the latter allows us to introduce a proper set of characteristic cohomology classes: Some of those just reproduce the ordinary Chern classes but there are also new odd-dimensional classes which take care of the extra topological information introduced by the chiral structure. Chiral vector bundles provide the proper geometric model for topological quantum systems in class AIII, namely for systems endowed with a (pseudo-)symmetry of chiral type. The classification of the chiral vector bundles over sphere and tori (explicitly computable up to dimension 4) recover the commonly accepted classification for topological insulators of class AIII which is usually based on the K-group K1. However, this new classification turns out to be even richer since it takes care also for the possibility of non trivial Chern classes.
Mon, 2015-06-01 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Keine Panik! Die Physik der Fußgängerdynamik und Evakuierungsprozesse
Prof. Dr. Andreas Schadschneider, Universität Köln
Tue, 2015-05-26 16:15(SR 5, Helmholtzweg 4)
Entanglement entropy as a probe for quantum gravity
Dr. Michael Ferlaino
University of Swansea, UK
Thu, 2015-05-21 14:15(SR 5, Helmholtzweg 4)
Induced QCD with Nc-1 auxiliary bosonic fields
Dr. Bastian Brandt, Universität Regensburg
Wed, 2015-05-20 16:15(SR 5, Helmholtzweg 4)
Binary Neutron Stars with Spin
Prof. Wolfgang Tichy, Florida Atlantic University

Note: Changed time from usual slot on Tuesday to Wednesday
Tue, 2015-05-19 16:15(SR 5, Helmholtzweg 4)
Modeling Liquids and Bulk Metallic Glasses
Prof. Jean Bellissard, Georgia Institute of Technology Atlanta, USA
Mon, 2015-05-18 16:15(HS 2, Abbeanum)
New efficient algorithm for the isometric embedding of 2-surface metrics in 3 dimensional Euclidean space
Wolfgang Tichy, Florida Atlantic University

We present a new numerical method for the isometric embedding of 2-geometries specified by their 2-metrics in three dimensional Euclidean space. Our approach is to directly solve the fundamental embedding equation supplemented by six conditions that fix translations
and rotations of the embedded surface. This set of equations is discretized by means of a pseudospectral collocation point method. The resulting nonlinear system of equations are then solved by a Newton-Raphson scheme. We explain our numerical algorithm in detail. By studying several examples we show that our method converges provided we start the Newton-Raphson scheme from a suitable initial guess. Our novel method is very efficient for smooth 2-metrics.
Wed, 2015-05-13 16:00(HS 2, Abbeanum)
Spinning particle in a Kerr background
Dr. Georgios Lukes-Gerakopoulos, Institute of Theoretical Physics, Charles University in Prague, Czech Republic
Tue, 2015-04-28 16:15
Modeling the Electronic Properties of Graphene
Prof. Lorenz von Smekal - Technische Universität Darmstadt
Fri, 2015-03-06 16:15(HS 2, Abbeanum)
Das Spätzeitverhalten relativistischer Wellen (Masterverteidigung)
Martin Becker, FSU Jena

Talks from 2014-10-01 up to 2015-02-28
Wed, 2015-01-28 17:15(Seminarraum HI Jena, Fröbelstieg 3)
Lightlike inhomogenities in worldline pair creation
Dr. Anton Ilderton, Chalmers University Göteborg

The locally constant field approximation (LFCA) is commonly used to calculate the nonperturbative pair production probability in electromagnetic fields.
In certain classes of fields, for example longitudinal electric fields depending on lightfront time, the LCFA is known to be exact. Using the worldline description of the effective action, we show that the reason for this is closely tied to the zero-mode problem of lightfront quantisation, and the so-called “triviality” of the lightfront vacuum.
Tue, 2015-01-27 16:15(SR 5, Helmholtzweg 4)
The Callias Index Theorem Revisited
Dr. Marcus Waurick, Technische Universität Dresden
Wed, 2015-01-21 16:15(HS 2, Abbeanum)
New Frontiers in integrated photonics: supersymmetry and unphysical phenomena
Prof. Dr. Alexander Szameit, IAP Universität Jena
Tue, 2015-01-20 16:15(SR 5, Helmholtzweg 4)
Asymptotic Safety in Gravity
Dr. Astrid Eichhorn, Imperial College London
Wed, 2015-01-14 16:00(SR 309, Carl-Zeiß-Str. 3)
From Schwarzschild to General Relativity: modeling physical phenomena with the help of geometry
Dr. Carla Cederbaum, Universität Tübingen
Tue, 2015-01-13 16:15
Spectral theory for continuum one-dimensional quasicrystal models
Dr. Christian Seifert, Technische Universität Hamburg-Harburg

We consider an ergodic family $(H_\omega)_{\omega\in\Omega}$ of continuum one-dimensional Schr\"odinger operators, where we allow for measures as potentials. We show that the random operator $H$ has Cantor type spectra of Lebesuge measure zero under suitable finite local complexity conditions on the potentials. Such operator families appear in the study of quasicrystalline models.
Thu, 2015-01-08 14:15(SR 5, HH 4, instead of the quantum theory seminar)
Perturbative Quantum Gravity III
Prof. Ilya Shapiro
Universidade Federal de Juiz de Fora
Wed, 2015-01-07 16:15(HS 2, Abbe., instead of the seminar of the institute)
Perturbative Quantum Gravity II
Prof. Ilya Shapiro
Universidade Federal de Juiz de Fora
Tue, 2015-01-06 16:15(SR 5, Helmholtzweg 4)
Perturbative Quantum Gravity I
Prof. Ilya Shapiro
Universidade Federal de Juiz de Fora
Thu, 2014-12-18 14:15
Critical behavior in spherical and hyperbolic space
Dr. Dario Benedetti (AEI Potsdam)
Wed, 2014-12-17 16:15
A Simple Proof of the Kochen-Specker Theorem on the Problem of Hidden Variables
Prof. Norbert Straumann, Universität Zürich
Tue, 2014-12-16 16:15(SR 5, Helmholtzweg 4)
Rendering integrands positive - subset method for lattice QCD at high density
Dr. Falk Bruckmann
Universität Regensburg
Wed, 2014-12-10 16:00(HS 2, Abbeanum)
apl.: AG Fachdidaktik der Physik und Astronomie
Prof. Lotze
Tue, 2014-12-09 16:15(SR 5, Helmholtzweg 4)
(Non)-Fermi Liquids
Dr. Tilman Enss
Ruprecht-Karls-Universität Heidelberg
Fri, 2014-12-05 11:30(Rosensäle)
Binary neutron stars: what we understand and what we don't
From Luciano Rezzolla for the GWA14 conference

I will review the recent progress made in modelling binaries of compact stars and the role played by magnetic fields and the equation of state in their evolution. Special attention will be paid to highlighting how the progress of ab-initio fully relativitistic calculations can be used to explain several aspects of the phenomenology of short gamma-ray burst, but also how new observations on the X-ray afterglows represent new riddles for the theoretical modeling.
Fri, 2014-12-05 10:00(Rosensäle)
Constraining the nature of gravitational waves with binary pulsar experiments
From Paulo Freire for the GWA14 conference

In this talk I present some recent pulsar timing experiments for double neutron stars that test general relativity's quadrupolar gravitational wave emission formula with unprecedented precision. I then present the results of timing of millisecond pulsar - white dwarf systems that severely constrain the emission of dipolar gravitational waves (DGW) for a wide range of neutron star masses. Apart from constraining (and in some cases excluding) alternative theories of gravity that predict DGW emission, these results reinforce our confidence in the templates being used to search for the GW signal of NS-NS and NS-BH inspiral events in the advanced LIGO and Virgo detectors.
Fri, 2014-12-05 09:00(Rosensäle)
Highest order post-Newtonian dynamics of non-spinning and spinning compact binaries in general relativity
From Gerhard Schäfer for the GWA14 conference

The talk delivers insight into the calculations of highest order post-Newtonian (PN) Hamiltonians for binary black holes. The conservative dynamics is presented up to 4 PN order for binaries with both non-spinning and spinning components, where the spins are counted of 0.5 PN order. The related dissipative radiation reaction dynamics is known up to 4.5 PN order. As application, the Innermost Stable Circular Orbit for spinless binaries is given through 4 PN order and the test-body limit is compared with the exactly known ISCO of a test-body orbiting a Schwarzschild black hole.
Thu, 2014-12-04 10:00(Rosensäle)
Binary black holes: Waveform modeling and two-body dynamics
From Harald Pfeiffer for the GWA14 conference

This talk will introduce the Spectral Einstein Code, a general relativistic code to solve the inspiral and merger of two black holes. I will give an update on numerical results with SpEC, and will discuss several applications of the simulations, among them the construction of waveform models within the effective-one-body formalism, the study of gravitational self-force effects through comparable-mass binary black hole simulations, and a comparison of the post-Newtonian precession dynamics with numerical simulations.
Thu, 2014-12-04 09:00(Rosensäle)
Gravitational waves from coalescing neutron star binaries
From Masaru Shibata for the GWA14 conference

Wed, 2014-12-03 10:00(Rosensäle)
Post-merger Oscillations in Binary Neutron Star Mergers
from Nikolaos Stergioulas for the GWA14 conference

Because of the recent discovery of two-solar-mass neutron stars, the equation of state of high density matter is likely to be sufficiently stiff to allow for a long-lived remnant, when two neutron stars merge. The merger excites a number of oscillation modes, having large (nonlinear) amplitude, that are interesting as gravitational waves sources for second- and third-generation interferometric detectors. Apart from a dominant linear oscillation mode, additional nonlinear contributions appear. I discuss the main properties of these oscillations as well as the prospects of constraining the mass and radius (and thus the equation of state) with future detections.
Wed, 2014-12-03 09:00(Rosensäle)
Searching for gravitational waves from the early Universe
from Fabian Schmidt for the GWA14 conference

Tue, 2014-12-02 11:30(Rosensäle)
Gravitational wave detection using squeezed light
from Roman Schnabel for the GWA14 Conference

Current gravitational wave (GW) detectors are Michelson-type kilometre-scale laser interferometers measuring the distance changes between in vacuum suspended mirrors. The sensitivity of these detectors is limited by quantum noise of the laser light. Since 2010, GEO600 has been using so-called nonclassical light that has a ‘squeezed’ quantum noise, and it has been demonstrated that squeezed light is able to increase the GW detector sensitivity at shot-noise limited frequencies. In future, squeezed light might be used to further improve the sensitivity of GW detectors, then also at radiation pressure noise dominated frequencies and at frequencies where photon-phonon scattering is limiting the detectors performance.
Tue, 2014-12-02 10:00
Gravitational waves from black-hole binaries
from Mark Hannam for the GWA14 Conference
Tue, 2014-12-02 09:00
Progress in Three-dimensional Supernova Modeling
from Hans-Thomas Janka for the GWA14 conference

3D supernova simulations have become possible only very recently and have already led to the discovery of novel and unexpected phenomena, although they still need to confirm the basic theoretical concepts of the explosion mechanism. The talk will review the status of 3D modeling and interesting new perspectives to probe the supernova core dynamics by neutrinos and gravitational waves measured in the case of a next galactic event.
Mon, 2014-12-01 19:00(Max-Wien-Platz 1, Lecture Hall 1)
Gravitationswellenastronomie: Bald Neues von der dunklen Seite des Universums!
Public Talk of the GWA14 Conference from Karsten Danzmann

Können wir das Universum hören? Auf den ersten Blick ist das eine unsinnige Frage, denn natürlich gibt es im Weltall keine Luft, in der sich der Schall ausbreiten könnte. Wenn aber un­sere Ohren nur empfindlich genug wären, dann könn­ten sie auf eine besondere Art von Wellen reagieren: auf Gravitationswellen! Vor mehr als 90 Jahren sagte Al­bert Einstein die Existenz von Gravitationswellen als Konsequenz seiner allgemeinen Relativitätstheorie vor­aus. Gravitationswellen sind winzige Verbiegungen des Raumes und der Zeit, die von schnellbewegten, großen Massen erzeugt werden und sich mit Lichtgeschwindig­keit wellenförmig ausbreiten. Sie wurden noch nie di­rekt nachgewiesen. Mehrere laserinterferometrische Gravitationswellendetektoren mit Armlängen von Ki­lometern werden gegenwärtig auf der Erde betrieben, um Gravitationswel­len zu erforschen, darunter auch GEO600 in der Nähe von Hannover. Bald folgen Detektoren im Weltraum mit Millionen km Armlänge, insbesondere die Satelliten-Mission LISA. Ausgangspunkt für diese geheimnis­vollen Wellen könnten z. B. verschmelzende Doppel­sterne, Neutronensterne, Supernovae, Schwarze Löcher und der Urknall sein. Ihre Beobachtung erfordert modernste Lasertechnologie und Messungen an der quantenmechanischen Nachweisgrenze.
Mon, 2014-12-01 15:00(Rosensäle)
Beyond the second generation of gravitational wave detectors
from Ronny Nawrodt for the GWA14 Conference

Gravitational wave detectors are currently upgraded to the 2nd generation achieving extremely high sensitivities in a wide frequency band. A first direct detection of gravitational waves is expected once these instruments are getting online. Such a detection will mark the starting point for a gravitational wave based astronomy. Thus, detectors of the third generation are designed to be used as efficient astronomical observatories. For this purpose the sensitivity of the 2nd generation detectors has to be enhanced. As the sensitivity of current instruments approaches the thermal noise floor of their fused silica components a radical change of materials is necessary. Additionally, 3rd generation detectors will be operated at cryogenic temperatures to further reduce thermal noise and increase their sensitivity. This talk will give an overview of proposed technologies towards 3rd generation detectors leading to a 10 times higher sensitivity throughout the audio band. The focus will lie on the selection of materials for the optics as well as the suspension elements according to their properties. The characterisation of these materials and the choice of their operational temperature is discussed as well.
Mon, 2014-12-01 14:00
From the beginning to the second generation of gravitational wave detectors
from David Shoemaker for the GWA 2014 Conference

A brief history of gravitational wave detection using laser interferometers will be given, followed by a status report on one example of the second generation of detectors, Advanced LIGO.
Tue, 2014-11-25 16:00(SR 5, Helmholtzweg 4)
Dark energy and the uniqueness of general relativity
Prof. Matthias Bartelmann
Ruprecht-Karls-Universität Heidelberg
Thu, 2014-11-20 14:15
Hamiltonian approach to QCD in Coulomb gauge: From the vacuum to finite temperatures
Prof. Dr. Hugo Reinhardt, Universität Tübingen
Wed, 2014-11-19 16:15(HS 2, Abbeanum)
Lightfront quantisation and strong field QED
Greger Torgrimsson (Chalmers)
Fri, 2014-11-14 16:00(HS 2, Abbeanum)
Ab Initio Simulationen zur Struktur und Dynamik warmer dichter Aluminiumplasmen
Hannes Rüter, MSc,
Universität Rostock
Thu, 2014-11-13 14:15
Non-Equilibrium Dynamics of a Holographic Superfluid
Andreas Samberg,
Ruprecht-Karls-Universität Heidelberg
Thu, 2014-11-06 14:15
Can effects of quantum gravity be observed in the CMB?
Prof. Claus Kiefer, University Cologne
Tue, 2014-11-04 16:15(SR 5, Helmholtzweg 4)
Supersymmetric Yang Mills Theories
Dr. Georg Bergner, Universität Bern
Tue, 2014-10-28 16:15(SR 5, Helmholtzweg 4)
Coupling constant metamorphosis and conformally covariant Laplacians
Dr. Jonathan Kress (University of New South Wales, Sydney)

Talks from 2014-03-01 up to 2014-09-30
Fri, 2014-08-22 15:00
Quantenmechanik in gekrümmter Raum-Zeit und die klassischen Mathisson-Papapetrou-Bewegungsgleichungen
Prof. Alexander Gorbatsievich (Belarussian State University, Minsk)
HS 3, Abbeanum
Thu, 2014-07-10 16:15(HS 2, Abbeanum)
Testing the nature of astrophysical black hole candidates
Prof. Cosimo Bambi (Fudan University)
Wed, 2014-07-09 14:15(HS 2, Abbeanum)
Global Flows in Quantum Gravity
Prof. Jan M. Pawlowski (Universität Heidelberg)
Tue, 2014-07-08 16:15(SR 5, Helmholtzweg 4)
Introduction to the FRG
Prof. Jan M. Pawlowski (Universität Heidelberg)
Mon, 2014-07-07 17:15(HS 1, Abbeanum)
Black hole physics in the laboratory
Dr. Silke Weinfurtner
University of Nottingham
Mon, 2014-06-30 14:00
SFB Video Seminar Talk - Wasilij Barsukow
Wed, 2014-06-25 17:00
Super-adiabatic particle number: can we watch vacuum particle production in real time?
Prof. Gerald Dunne (Connecticut U.)
Tue, 2014-06-24 16:15
Violation of Lorentz invariance, related phenomena, and experiments
Dr. Marco Schreck (Indiana University)
Mon, 2014-06-23 18:00(HS 1, Abbeanum)
Optische Glasfasern - eine Plattform für die Photonik
Prof. Dr. Markus Schmidt
Leibniz-Institut für Photonische Technologien
Mon, 2014-06-23 14:00
SFB Video Seminar Talk - Matteo Bugli
Thu, 2014-06-19 14:15
Black hole analogues & robustness of Hawking radiation
Prof. Ralf Schützhold (Duisburg-Essen U.)
Tue, 2014-06-17 16:15(SR 5, Helmholtzweg 4)
Dilaton Quantum Gravity
Tobias Henz, Universität Heidelberg
Mon, 2014-06-16 17:15(HS 1, Abbeanum)
Optische Interferometer mit sub-Attometer Auflösung - Wege zur Gravitationswellenastronomie
Dr. Ronny Nawrodt
Institut für Festkörperphysik
Mon, 2014-06-16 14:00
SFB Video Seminar Talk - Oliver Just
Tue, 2014-06-10 16:15(SR 5, Helmholtzweg 4)
Self-adjoint, globally defined Hamiltonian operators for systems with boundaries
Prof. Andrea Posilicano (University of Insurbia)
Mon, 2014-06-02 17:15(HS 1, Abbeanum)
Free-evolution formulations of General Relativity and their numerical approximation
Dr. David Hiltich
Theoretisch-Physikalisches Institut,
FSU Jena
Mon, 2014-05-26 17:15(HS 1, Abbeanum)
Relativitätstheorie relativ anschaulich - Visualisierungen und Modellexperimente
Prof. Dr. Ute Kraus
Universität Hildesheim
Thu, 2014-05-22 14:15
Resurgence in Quantum Field Theory
Prof. Gerald Dunne (Connecticut U.)
Wed, 2014-05-21 16:15(HS 2, Abbeanum)
Strongly coupled physics: when dynamics generates structure
Prof. Jens Braun (TU Darmstadt)
Tue, 2014-05-20 14:15(SR 5, Helmholtzweg 4)
Supersymmetric Yang-Mills on the Lattice - Recent Developments
Anosh Joseph (DESY Zeuthen)
Mon, 2014-05-19 14:00
Magnetars: from X-rays to gravitational waves (and back)
Speaker: Simone D'allosso
Wed, 2014-05-14 16:15(HS 2, Abbeanum)
Towards a multi-messenger picture of compact binary mergers
Prof. Stephan Rosswog (Stockholm University)
Mon, 2014-05-12 17:15(HS 1, Abbeanum)
Quantumcomputer - Rechenkunst mit Quantenphysik
Prof. Dr. Rainer Blatt
Universität Innsbruck
Mon, 2014-05-05 17:15(HS 1, Abbeanum)
Was heißt und zu welchem Ende studiert man Bohmsche Mechanik?
Prof. Dr. Detlef Dürr
Ludwig-Maximilians-Universität München
Mon, 2014-05-05 14:00
"Taming the post-Newtonian expansion: How to simplify complicated high-order post-Newtonian expressions
Speaker: Nathan Johnson-McDaniel
Tue, 2014-04-29 16:15(SR 5, Helmholtzweg 4)
Resurgence: connecting perturbative and non-perturbative physics
Prof. Gerald Dunne (Connecticut U.)
Mon, 2014-04-28 17:15(HS 1, Abbeanum)
Tumor therapy with scanned carbon ion beams
Dr. Christian Gräf
Helmholtzzentrum für Schwerionenforschung GmbH
Mon, 2014-04-28 14:00
Magnetars: from X-rays to gravitational waves (and back)

speaker: Simone Dall'Osso
Mon, 2014-04-14 14:00
SFB Video Seminar Talk - Daniel Siegel
Thu, 2014-04-10 14:15(SR 5, Helmholtzweg 4)
Resurgence: connecting perturbative and non-perturbative physics
Prof. Gerald Dunne (Connecticut U.)
Tue, 2014-04-08 15:15(SR 5, Helmholtzweg 4)
Resurgence: connecting perturbative and non-perturbative physics
Prof. Gerald Dunne (Connecticut U.)
Thu, 2014-03-06 14:15
Vector Boson Scattering after Higgs Discovery
Marco Sekulla (Uni. Siegen)
Wed, 2014-03-05 11:15(HS 2, Abbeanum)
All you can solve
Prof. Dr. Michael Thies (Erlangen)

Talks from 2013-10-01 up to 2014-02-28
Tue, 2014-02-18 16:15
Reduction of the NP formalism to 3-dimensional geometry
Robert Milson
Dalhousie University Halifax
Fri, 2014-02-07 16:15(HS 2, Abbeanum)
Physical properties of perturbed Kerr black holes in ACMC slices
Dr. Rodrigo Panosso Macedo
FSU Jena
Mon, 2014-02-03 17:15
Komplexe Verbindungshalbleiter: Von der atomaren Struktur zur Bandlücke
Dr. Claudia Schnohr
Institut für Festkörperphysik
Wed, 2014-01-29 16:15(HS 2, Abbeanum)
Modeling Type Ia supernova explosions
Prof. Dr. Friedrich Röpke
Universität Würzburg
Tue, 2014-01-28 16:15(SR 5, Helmholtzweg 4)
Particle Physics @ Low Energies
Prof. Joerg Jaeckel
Wed, 2014-01-22 16:15(HS 2, Abbeanum)
Quantum field theory on DeSitter spacetime
Prof. Stefan Hollands
Universität Leipzig
Mon, 2014-01-20 18:00(Aula der FSU)
Elektronendynamik in starken Feldern
Prof. Dr. Stephan Fritzsche
Helmholtz-Institut Jena
Mon, 2014-01-20 14:00(URZ 28)
Can spin be ignored in neutron star mergers?
Tim Dietrich
TPI Jena
Thu, 2014-01-16 14:15(SR 5, Helmholtzweg 4)
Simulating full QCD at nonzero density using the complex Langevin equation
(Denes Sexty, University of Heidelberg)


The complex Langevin method is extended to full QCD at non-zero chemical potential. The use of gauge cooling stabilizes the simulations at small enough lattice spacings. At large fermion mass the results are compared to the HQCD approach, in which the spatial hoppings of fermionic variables are neglected, and good agreement is found. The method allows simulations also at high densities, all the way up to saturation. Preliminary results of a comparison to the reweighting approach are presented.
Wed, 2014-01-15 16:15(HS2, Abbeanum)
Gravity actions from matter actions II: derivation of the spacetime dynamics
Dr. Frederic Schuller
Tue, 2014-01-14 16:15(SR 5, Helmholtzweg 4)
Gravity action from matter actions I: derivation of the spacetime kinematics
Dr. Frederic Schuller
Mon, 2014-01-13 17:15(HS 1, Abbeanum)
Integrierte optische Schaltkreise für klassisches und nicht-klassisches Licht
Jun.-Prof. Dr. Alexander Szameit
Institut für Angewandte Physik
Tue, 2014-01-07 16:15
Global Completeness of Quantum Gravity
Benjamin Knorr (Heidelberg)
Mon, 2014-01-06 17:15(Hörsaal 1, Max-Wien-Platz)
Entstehung und Entwicklung von Magnetfeldern in Galaxien und Galaxienhaufen
Prof. Dr. Harald Lesch
LMU München
Thu, 2013-12-19 14:15
From quarks and gluons to baryon properties
Gernot Eichmann (Uni. Giessen)
Mon, 2013-12-16 14:00(URZ 28)
Equilibrium models of relativistic stars with a toroidal magnetic field
Speaker: Joachim Frieben (AEI Potsdam)
Tue, 2013-12-10 16:15(SR 5, Helmholtzweg 4)
ART und Thermodynamik Schwarze Löcher
Prof. Emil Mottola
Los Alamos National Laboratory
Mon, 2013-12-09 17:15(HS 1, Abbeanum)
Kosmologische Magnetfelder
Prof. Dr. Ruth Durrer
University of Genf, Schweiz
Mon, 2013-12-09 14:00
"All the things you would like to know about chaotic indicators in GR"
Georgios Loukes-Gerakopoulos
FSU Jena
Thu, 2013-12-05 14:15(SR 5, Helmholtzweg 4)
Physical analogies of black hole horizons: from the Young-Laplace law to the quantum charged particle
Jose-Luis Jaramillo
Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Golm/Potsdam
Tue, 2013-12-03 16:15(SR 5, Helmholtzweg 4)
Differentialgeoemtrie auf Mannigfaltigkeiten II
Dr. Rainer Oloff
FSU Jena
Mon, 2013-12-02 17:15(HS 1, Abbeanum)
Modeninstabilitäten in Hochleistungsfaserlasern
Dr. Cesar Jauregui
Institut für Angewandte Physik
Fri, 2013-11-29 16:15(HS 2, Abbeanum)
Die Kerr-Metrik in ADM-Koordinaten in quadratischer Ordnung im Spin und hoher post-Newtonscher Ordnung
Verteidigung der Masterarbeit
Jan Sperrhake
TPI Jena
Tue, 2013-11-26 16:15
Differentialgeometrie auf Mannigfaltigkeiten I
Dr. Rainer Oloff
FSU Jena
Mon, 2013-11-25 17:15(HS 1, Abbeanum)
Quantenlogisticspectroskopie - Von fundamentalen Tests zur Astronomie
Prof. Dr. Piet Schmidt
PTB Braunschweig
Mon, 2013-11-25 14:00
Magnetic field decay in magnetars: evidence and inference"
Simone Dall'Osso
Universität Tübingen
Thu, 2013-11-21 14:15(SR 5, Helmholtzweg 4)
Entanglement Entropy for Probe Branes, the leading Backreaction
Han-Chih Chang
UW Seattle
Wed, 2013-11-20 16:15(HS 2, Abbeanum)
Anomalies IV (C-theorem basics)
Prof. Martin Ammon
FSU Jena
Tue, 2013-11-19 16:15(SR 5, Helmholtzweg 4)
Anomalies III (conformal anomalies)
Prof. Martin Ammon
FSU Jena
Mon, 2013-11-18 17:15(HS 1, Abbeanum)
Geschichte und historisches Umfeld der vormalig Herzoglichen Sternwarte in Jena
Veranstaltung anlässlich des 200. Geburtstages der Sternwarte in Jena
Prof. Dr.Olaf Breidbach
Institut für Geschichte der Medizin, Naturwissenschaft und Technik "Ernst Haeckel-Haus"
Mon, 2013-11-18 14:00(URZ 28)
"Rapidly rotating neutron stars in scalar-tensor theories of gravity"
Daniela Doneva
Universität Tübingen
Wed, 2013-11-13 16:15(HS 2, Abbeanum)
Anomalies II (gauge anomalies)
Dr. Axel Maas
FSU Jena
Tue, 2013-11-12 16:15(SR 5, Helmholtzweg 4)
Anomalies I (global anomalies)
Dr. Axel Maas
FSU Jena
Mon, 2013-11-11 17:15(HS 1, Abbeanum)
Analytische Modellierung von Metamaterialien
Dr. Arkadi Chipouline
Institut für Angewandte Physik
Wed, 2013-11-06 16:15(HS 2, Abbeanum)
The Instability of de Sitter Space & the Schwinger Effect
Emil Mottola
Los Alamos National Laboratory
Mon, 2013-10-28 17:15(HS 1, Abbeanum)
Behavior of materials under a dense and nanometric electron excitation
Prof. Dr. Marcel Toulemonde
CNRS Caen, France
Mon, 2013-10-21 17:15(Hörsaal 1, Max-Wien-Platz)
On the unreasonable effectiveness of post-Newtonian theory in gravitational physics
Prof. Dr. Cliff Will
University of Florida, USA

Talks from 2013-03-01 up to 2013-09-30
Mon, 2013-09-09 11:15(HS 2, Abbeanum)
Stability of magnetic condensation and mass generation for confinement in SU(2) Yang-Mills theory
Prof. Kei-Ichi Kondo (Chiba University, Japan)
Thu, 2013-09-05 11:00(HS 2, Abbeanum)
Kollidierende ebene Gravitationswellen
Sebastian Möckel
FSU Jena
Verteidigung der Masterarbeit
Mon, 2013-08-26 11:00(HS 2, Abbeanum)
Einsteinsche Gravitationsfelder gegenrotierender Staubscheiben
Verteidigung der Masterarbeit
Steven Krause
FSU Jena
Tue, 2013-08-13 11:15(HS 5 Abbeanum)
Functional renormalization of N scalars with O(N) invariance
Dr. Mahmoud Safari (SISSA, Trieste)
Thu, 2013-08-08 14:15
Excited states and hadron resonances from Lattice QCD
Daniel Mohler (Fermilab, USA)

A selective review of recent progress in lattice QCD calculations of excited states and QCD resonances is presented. The challenges of extracting excited state energy levels and of their interpretation will be discussed, using data from recent simulations as examples. Emphasis will be placed on simulations that explicitly include multi-particle (meson-meson and meson-baryon) states in channels with either a low-lying QCD resonance or with a bound state close to threshold.
Tue, 2013-07-23 16:15(HS 5, Abbeanum)
Binary black hole evolutions with improved initial data
Wolfgang Tichy
Florida Atlantic University
Thu, 2013-07-11 14:15
N=1 supersymmetric Yang-Mills theory — Lattice supersymmetry and investigations beyond the standard modell
Dr. Georg Bergner,
Institut fuer Theoretische Physik
Johann Wolfgang Goethe-Universität
Frankfurt am Main
Wed, 2013-07-10 16:15(Sem.-Raum Nr. 384 (3. Stock) Carl-Zeiß-Str. 3)
Neutron star constraints on modified theories of gravity
Dr. Yavuz Eksi, TU Istanbul:
Mon, 2013-07-08 18:00(Aula)
Modellierung und Simulation von Materialstrukturen und Eigenschaften
Prof. Dr. Marek Sierka
Institut für Materialwissen-schaft und Werkstoff-technologie
Fri, 2013-07-05 16:15
Binary Black Hole mergers in magnetized disks: Simulations in full General Relativity
Dr. Roman Gold
University of Illinois at Urbana-Champaign, USA
Thu, 2013-07-04 14:15(SR 5, Helmholtzweg 4)
Some mathematical thoughts on Dyson-Schwinger equations
(Karen Yeats, Simon-Fraser-University, Ca)


I will discuss how to view Dyson-Schwinger equations combinatorially, how they relate to classic combinatorial constructions, how we can use this structure to say physical things, and how in one very special case we can give a fully combinatorial solution.
Wed, 2013-07-03 16:15
Ground state properties in non-relativistic Quantum Electrodynamics
Prof. Dr. David Hasler,
Math. Institut, FSU Universität Jena
Wed, 2013-07-03 10:15(HHW 3; HS 3)
asymptotically safe gravity
Prof. Dr. Daniel Litim,
University of Sussex, Brighton, UK
Tue, 2013-07-02 16:15(SR 5, Helmholtzweg 4)
asymptotically safe gravity
Prof. Dr. Daniel Litim,
University of Sussex, Brighton, UK
Mon, 2013-07-01 18:00(Aula)
Die faszinierende Welt starker Felder: Experimente mit hochgeladenen Ionen
Prof. Dr. Thomas Stöhlker
Helmholtz Institut Jena
Wed, 2013-06-26 16:15
The discovery of a Higgs Boson at CERN - opening the door to a new world
Prof. Kobel (Uni Dresden)


A thorough study of the properties of the new particle,
found by the ATLAS and CMS experiments at 126 GeV in 2012
has meanwhile revealed: We indeed have found a Higgs Boson.
According to the Standard Model it would be the first member
of a so far unseen class of particles: a fundamental scalar,
i.e. a Spin 0 state, not composed of any further constituents.
If remains to be proven, if this is the really the case,
and if there might be even more such Higgs particles, as
predicted in many extensions of the Standard Model like
But even within the Standard Model several vertices related
to the Higgs Bosons remain to be observed. One is part of
the scattering of two Vector Bosons VV->VV, where V=W,Z.
For not violating basics rules of probability ("unitarity")
this scattering requires in the Standard Model the regulating contribution
of Higgs-Boson exchange. This so far unobserved scattering process thus
constitutes a crucial test of the properties of the 126 GeV Higgs Boson,
and of the mechanism of electroweak symmetry breaking.
Thu, 2013-06-20 16:15(Ernst-Abbe-Platz 2, R 3319)
The Importance of Software in High-Performance Computing
Prof. Dr. Christian Bischof
TU Darmstadt, Informatik, Fachgebiet Scientific Computing
Mon, 2013-06-17 17:15(HS 1, Abbeanum)
Attosecond Laser Physics
Prof. Dr. Anne l'Huillier
Lund University, Schweden
Thu, 2013-06-13 14:15
Topolog. Aspekte von Eichtheorien III
Prof. Frieder Lenz
Universität Erlangen
Wed, 2013-06-12 16:15
Topolog. Aspekte von Eichtheorien II
Prof. Frieder Lenz
Universität Erlangen
Tue, 2013-06-11 16:15
Topolog. Aspekte von Eichtheorien I
Prof. Frieder Lenz, Universität Erlangen
Fri, 2013-06-07 14:30
On the Gribov problem in Yang-Mills theory
(Olaf Lechtenfeld, Uni Hannover)
Thu, 2013-06-06 14:15(SR 5, Helmholtzweg 4)
Ubiquitous QCD & LHC phenomenology
Steffen Schuman, Univ. Goettingen
Wed, 2013-06-05 16:15
Non-equilibrium steady states and charge fractionalization in Luttinger liquids
Prof. Bernd Rosenov
Universität Leipzig
Tue, 2013-06-04 16:15
Prof. Martin Ammon, FSU Jena, PAF, TPI
Mon, 2013-06-03 17:15(HS 1, Abbeanum)
Nichtlineare Dynamik von Licht in künstlichen photonischen Strukturen
Dr. Oleg Egorov
Institut für Festkörpertheorie und -optik
Fri, 2013-05-31 14:00(HS 1 Physik, Max-Wien-Platz 1)
11. Alumni-Tag der PAF mit feierlicher Zeugnisübergabe
FSU PAF, JENOPTIK, MLP, Rohde & Schwarz, HEPTAGON, werth Messtechnik
Tue, 2013-05-28 16:15
Prof. Martin Ammon, FSU Jena, PAF, TPI
Mon, 2013-05-27 17:15(HS 1, Abbeanum)
Free-electron X-ray Lasers: Optical Lasers of the 21 st
Prof. Dr. Jerry Hastings
Stanford University, USA
Mon, 2013-05-27 14:00(URZ 28)
Spectral analysis of quasi-normal modes of Schwarzschild black holes
Robert Pannicke
FSU Jena
URZ 28
Mon, 2013-05-13 17:15(HS 1, Abbeanum)
Casimir-Lifshitz forces: vacuum fluctuations, quantum levitation and the future of nanomachines
Prof. Dr. Federico Capasso
Harvard School of Engineering and Applied Sciences, USA
Wed, 2013-05-08 16:15
On the shape of rotating black-holes
Dr. Martin Reiris
Max Planck Institute for Gravitational Physics - AEI
Tue, 2013-05-07 16:15
Emulating relativistic physics in waveguide arrays
Prof. Dr. Alexander Szameit
Universität Jena, IAP
Mon, 2013-05-06 17:15(HS 1, Abbeanum)
Theoretische und rechnergestützte Photonik der komplexen mikro- und nanostrukturierten Materialien
Dr. Dmitry Chigrin
1. Physikalisches Institut, RWTH Aachen
Thu, 2013-05-02 14:15(SR 5, Helmholtzweg 4)
The Scattering Theory Approach to the Casimir Energy
Prof. Noah Graham
Middlebury College, USA
Tue, 2013-04-30 17:15
Energy-Momentum Tensors and Energy Conditions with Worldline Numerics - Promotinsverteidigung
Dipl.-Phys. Marco Schäfer
Thu, 2013-04-25 14:15(SR 5, Helmholtzweg 4)
Simulating fermion production in 1+1 dimensional QED
Dr. Florian Hebenstreit
Universität Heidelberg
Tue, 2013-04-23 16:15
Alexander Blinne
Universität Jena
Mon, 2013-04-22 17:15(HS 1, Abbeanum)
Neutrinos als Sonden für neue Physik
Prof. Dr. Manfred Lindner
MPI Heidelberg
Mon, 2013-04-15 18:00(Aula)
Design und Analyse optischer Systeme
Prof. Dr. Herbert Gross
Institut für Angewandte Physik
Wed, 2013-03-13 16:00(HS 2, Abbeanum)
Quasi-Normal Modes
Prof. Bernd Schmidt
AEI Potsdam
Wed, 2013-03-06 16:15(HS 2, Abbeanum)
Accurate and efficient GW phasing and it's implications
MSc Anuradha Gupta

Tata Institute of Fundamental Research, Mumbai, Indien

Talks from 2012-10-01 up to 2013-02-28
Thu, 2013-02-21 14:15
Asymptotic Safety of Gravity in Tetrad Field Variables
Dr. Ulrich Harst (Mainz U.)
Tue, 2013-02-19 16:15
On Gluon spectral functions in finite temperature Yang-Mills theory
Michael Haas (Uni Heidelberg)
Wed, 2013-02-13 16:15(HS2, Abbeanum)
Metric-affine theories of gravity
Herr Prof. Dr. Rainer Schimming and Herr Dr. Ahmad Fouad
Universitaet Greifswald,
Institut für Mathematik und Informatik,
Wed, 2013-01-30 16:15(HS 2, Abbeanum)
Numerical Relativity in Spherical Polar Coordinates
Prof. Thomas Baumgarte
Bowdoin College, USA
Tue, 2013-01-29 17:15(HS 2, Helmholtzweg 5)
Promotionsverteidigung : Binärsysteme kompakter Objekte in hoher postnewtonscher Näherung in den Eigendrehimpuls-Wechselwirkungen
Dipl.-Phys. Johannes Hartung
Mon, 2013-01-28 14:00(URZ 28)
Numerical Relativity in Spherical Polar Coordinates: Calculations with the BSSN Formulation"
Pedro Montero
MPA Garching

pdf at
Wed, 2013-01-23 16:15(HS2, Abbeanum)
Exact results for QCD-like theories at high density
Prof. Tilo Wettig
Universität Regensburg
Tue, 2013-01-22 16:15(SR 5, Helmholtzweg 4)
Dr. Michael Scherer
ITP, Univ. Heidelberg
Mon, 2013-01-21 14:00(URZ 28)
Numerical long-term integration of compact binary systems
Jonathan Seyrich
Universität Tübingen

pdf at
Wed, 2013-01-16 16:15
Informatk-Elemente in Computational Science
Prof. Dr. Martin Bücker
FSU Jena, Institut für Informatik
Mon, 2013-01-14 18:15(Aula der FSU)
Antrittsvorlesung "Laser in der Medizin"
Herrn Prof. Dr. Alexander Heisterkamp, FSU Jena, PAF, IAO
Mon, 2013-01-14 14:00(URZ 28)
Nucleosynthesis in the ejecta of neutron-star mergers
Andreas Bauswein
MPA Garching

pdf at
Wed, 2013-01-09 14:15(Besprechungsraum des IOQ)
Introduction to the string-inspired worldline formalism II: sample calculations
Christian Schubert
Instituto de Física y Matemáticas,
Universidad Michoacana de San Nicolás de Hidalgo, Mexico
Fri, 2012-12-21 16:15(HS 2, Abbeanum)
Lichtablenkung im Gravitationsfeld einer starr rotierenden Staubscheibe
Dvin Galstian Pour (TPI)
(Verteidigung der Studienarbeit)
Mon, 2012-12-17 17:15(HS 1, Abbeanum)
Quantum Physics with Ultra-Cold Atoms: from Bose-Einstein Condensation to Quantum Simulation
Prof. Dr. Gerhard Birkl
TU Darmstadt
Mon, 2012-12-17 14:00(URZ 28)
event without name
Dr. David Hilditch
FSU Jena

pdf at
Wed, 2012-12-12 16:15(HS 2, Abbeanum)
Diplomvortrag: Starr rotierende Sterne maximaler Masse für verschiedene Zustandsgleichungen
Student Erik Buchholz, FSU Jena, PAF, TPI
Fri, 2012-12-07 15:15(HS 2, Haus 2, HHW5)
Non-perturbative Aspects of Non-linear Sigma Models (Dr.rer.nat.)
M.Sc. Raphael Flore , FSU Jena, PAF, TPI
Thu, 2012-12-06 00:00(Rosensäle)
Mon, 2012-12-03 14:00(URZ 28)
General-relativistic neutrino leakage scheme and neutrino-induced collapse
Filippo Galeazzi
AEI Potsdam

pdf at
Thu, 2012-11-29 00:00(Jena)
Workshop: Strongly-Interacting Field Theories
Mon, 2012-11-26 14:00(URZ 28)
Measuring the masses of white dwarf binaries - a multimessenger approach
Nathan Johnson-McDaniel
FSU Jena

pdf at
Tue, 2012-11-20 16:15
Fermionische Systeme auf gekrümmtem Hintergrund
Stefan Lippoldt,
FSU Jena
Tue, 2012-11-20 10:15
Hadronic contributions to the anomalous magnetic moment of the muon
Tobias Goecke,
University of Giessen
Mon, 2012-11-19 17:15(HS 1, Abbeanum)
Organische Halbleiter – Laborkuriosität oder Material der Zukunft?
Prof. Dr. Karl Leo
TU Dresden
Mon, 2012-11-19 14:00(URZ 28)
Relativistic precession of orbits around neutron stars"
Dr. Georgios Pappas
Universität Tübingen

pdf at
Thu, 2012-11-15 14:15
Precision simulations of LHC physics (Frank Krauss, University of Durham)
Tue, 2012-11-06 16:15(SR 5, Helmholtzweg 4)
Graph theory applied to seki positions in the game of Go
Prof. Thomas Wolf, Brock University, Canada
Mon, 2012-11-05 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Binary Black Hole Mergers
Prof. Dr. Thomas W. Baumgarte
Bowdoin College, USA
Mon, 2012-11-05 14:00(URZ 28)
Numerical solution of the 2+1 Teukolsky equation on a hyperboloidal foliation of the Kerr spacetime
Enno Harms MSc.
FSU Jena
Fri, 2012-11-02 17:00(HS 2, Abbeanum)
Post-Newtonsche Entwicklung einer starr rotierenden Staubscheibe mit konstanter spezifischer Ladung
Stefan Palenta
FSU Jena
Fri, 2012-11-02 16:15(HS 2, Abbeanum)
Herleitung der Kerr-Newman-Lösung über ein Randwertproblem
Rene Richter
FSU Jena
Tue, 2012-10-30 16:15(SR 5, Helmholtzweg 4)
Hyperdeterminants as integrable 3D difference equations
Prof. Thomas Wolf, Brock University, Canada
Mon, 2012-10-29 14:00(URZ 28)
Initial data for rotating black holes on hyperboloidal slices
David Schinkel DP
FSU Jena

pdf at
Tue, 2012-10-16 16:15(SR 5, Helmholtzweg 4)
About the integrability of ordinary matrix differential equations
Prof. Thomas Wolf, Brock University, Canada
Mon, 2012-10-15 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Gravitational Wave Science
Prof. Dr. B. Schutz
MPI für Gravitationsphysik Potsdam
Thu, 2012-10-11 00:00(Oppurg)
Workshop: Numerical and Mathematical Relativity
The aim of the workshop is to give numerical relativists the opportunity to learn about topics in mathematical relativity beyond the level that they would typically be discussed by the numerical relativity community, and to inform the mathematical community about the current state of the art in numerical simulations. To this end talks will be presented over the following topics:

  • Global results for numerical relativists.
  • Formulations of general relativity.
  • Boundary conditions and well-posedness of the initial boundary value problem.
  • Accurate and stable discretizations of spacetime.

Please contact us for further details.
NRMR12 AT uni-jena.de

David Hilditch, Andreas Weyhausen and Bernd Brügmann from the University Jena
Wed, 2012-10-10 16:15(HS2, Abbeanum)
Initial data for rotating black holes on hyperboloidal slices
Student Schinkel, David

Talks from 2012-03-01 up to 2012-09-30
Thu, 2012-09-27 16:15(HS 2, Haus 2, HHW5)
Low-Dimensional Chiral Physics: Gross-Neveu Universality and Magnetic Catalysis
Dipl.-Phys. Daniel Scherer
Wed, 2012-09-26 15:00(HS 2, Abbeanum)
Gauge drivers for the z4c formulation
Student Moritz Feyerabend
Wed, 2012-09-26 14:30(HS 2, Abbeanum)
Inital data for neutron star binaries
Student Niclas Moldenhauer
Wed, 2012-09-26 14:00(HS 2, Abbeanum)
Numerical Methods for the Construction of Black Hole Initial Data
Student Martin Fruhnert
Fri, 2012-09-21 14:30(HS 2, Abbeanum)
Black Hole Data in Axial Symmetry
Student Tim Dietrich
Fri, 2012-09-21 14:00(HS 2, Abbeanum)
Numerical solution of the 2+1 Teukolsky equation on a hyperboloidal foliation of the Kerr spacetime
Student Enno Harms
Tue, 2012-07-31 16:00(SR 5, Helmholtzweg 4)
Weyl metrisability for projective surfaces
Dr. Thomas Mettler
ETH Zürich
Wed, 2012-07-25 16:15
Problems and Alternatives of the Lambda Cold Dark Matter Model
Dr. Tonatiuh Matos
Cinvestav, Mexico
Fri, 2012-07-20 16:15
Towards 4th post-Newtonian 2-point-mass ADM Hamiltonian
Prof. Dr. P. Jaranowski
University Bialystok Polen
Wed, 2012-07-18 16:15
Electromagnetic fields of a trefoil knot
Prof. Dr. V. V. Sreedhar
Chennai Mathematical Institute, Indien
Tue, 2012-07-17 16:15
Observable consequences of dark energy
Prof. Matthias Bartelmann
Ruprecht-Karls-Universität Heidelberg
Mon, 2012-07-16 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Habilitationsvorstellung: Beobachtungen zur Planetenentstehung
Dr. Markus Mugrauer
Astrophysikalisches Institut, FSU Jena
Mon, 2012-07-16 14:00
Dr. Wolfgang Tichy
Florida Atlantic University
Thu, 2012-07-12 14:15(SR 5, Helmholtzweg 4)
On the Physical Quantity in Time Symmetric Formulation of Quantum Mechanics
Prof. Izumi Tsutsui
KEK, Japan
Wed, 2012-07-11 16:15(HS 2, Abbeanum)
Atomic Quantum Simulation of Dynamical Gauge Fields using Quantum Links
Prof. Uwe-Jens Wiese
Institute for Theoretical Physics, Albert Einstein Center for Fundamental Physics
Tue, 2012-07-10 17:15
Phase diagrams of excetional and supersymmetric lattice gauge theories
Dipl.-Phys. Björn Wellegehausen
(Verteidigung der Dissertation)
Theoretisch-Physikalisches Institut, FSU Jena
Mon, 2012-07-09 14:00
The evolution of the f-mode instability
Dr. Andrea Passamonti
Universität Tübingen
Wed, 2012-07-04 16:15
Compact Stars and the Nuclear Equation-of-State from Heavy-Ion Data
Prof. Schaffner-Bielich
Mon, 2012-07-02 18:00
Antrittsvorlesung: Teilchenbeschleunigung mit Hochleistungsfasern
Prof. Dr. Malte Kaluza
Institut für Optik und Quantenelektronik, FSU Jena
Thu, 2012-06-28 17:00(HS 2, Helmholtzweg 5)
Critical phenomena in (2+1)-dimensional relativistic fermion systems
Dipl.-Phys. Lukas Janssen
Theoretisch-Physikalisches Institut, FSU Jena
Thu, 2012-06-28 14:15
Introduction to conformal invariance in QFT
Prof. Harald Dorn
Humboldt-Universität zu Berlin
Wed, 2012-06-27 16:15
Introduction to conformal invariance in QFT
Prof. Harald Dorn
Humboldt-Universität zu Berlin
Thu, 2012-06-21 14:15
Exotic supersymmetries of finite-gap and reflectionless systems
Prof. Dr. Mikhail Plyushchay
Universidad de Santiago de Chile
Tue, 2012-06-19 16:15
Loss of linear momentum from inspiralling compact binaries in quasi-circular orbits and associated recoil
Chandra Kant Mishra
Raman Research Institutes in Bangalore, India
Mon, 2012-06-18 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
Physik in Alltagskontexten lehren
Prof. Dr. R. Müller
TU Braunschweig
Mon, 2012-06-18 14:00
CPU vs. GPU: A finite difference example
Gerhard Zumbusch
FSU Jena
Thu, 2012-06-14 14:15
Resonances and Unitarity in Weak Boson Scattering at the LHC
Dr.Jürgen Reuter
DESY Hamburg
Wed, 2012-06-13 16:15(HS 2, Abbeanum)
Introduction to Perturbative Quantum Field Theory and QCD
Dr. Jürgen Reuter
DESY Hamburg
Thu, 2012-06-07 14:15
About densities of states and the 3d O(2) quantum theory at finite densities
Dr. Kurt Langfeld
University of Plymouth, England
Wed, 2012-06-06 16:15
The Euler-Heisenberg Effective Action: History and Scientific Legacy
Prof. Gerald Dunne
University of Connecticut
Mon, 2012-06-04 17:15(Hörsaal 1 Abbeanum, Fröbelstieg 1 (PAF Kolloquium))
A Theorist's Take on LHC
Prof. Dr. Tilmann Plehn
Universität Heidelberg
Thu, 2012-05-24 14:00(SR 5, Helmholtzweg 4)
Constraining the Higgs boson mass: a non-perturbative lattice study
Dr. Karl Jansen
DESY Zeuthen
Tue, 2012-05-22 16:00
Spontaneous Breaking of Scale Invariance, Trace Anomaly and Supersymmetry
Prof. M. Moshe
Israel Institute of Technology
Mon, 2012-05-21 17:00(HS 1, Abbeanum)
Dunkle Materie, dunkle Energie - moderne Entwicklungen in der Kosmologie
Prof. Dr. Hanns Ruder
Universität Tübingen
Tue, 2012-05-15 16:00
Non-perturbative gauge-fixing
PD Dr. Axel Maas
FSU Jena
Mon, 2012-05-14 17:00
Prof. Dr. Jochen Walz
Universität Mainz
Mon, 2012-05-14 14:00(URZ 28)
Black-hole production from ultrarelativistic collisions
Dr. Kentaro Takami
AEI Potsdam
Fri, 2012-05-11 16:00
Analytische Untersuchungen der Geodäten in der Kerr-Metrik (Studienarbeit)
Kevin Meier
FSU Jena
Wed, 2012-05-09 16:00(HS 2, Abbeanum)
Einstein's Zürich Notebook and his Journey to General Relativity
Prof. Straumann, Norbert
Universität Zürich
Tue, 2012-05-08 16:00
Perturbative gauge-fixing
PD Dr. Axel Maas
FSU Jena
Mon, 2012-05-07 17:00
Prof. Dr. Paul Corkum
NRC Ottawa, Kanada
Mon, 2012-05-07 15:50
Solving post-Newtonian equations of motion with spin exactly
Dr. Steven Hergt
FSU Jena

URZ 28
Fri, 2012-05-04 16:15
Listening to Gravitational Waves with Pulsar Timing Arrays
Xihao Deng
Department of Physics, Penn State University Park,Pennsylvania

HS 2, Abbeanum
Fri, 2012-04-27 16:00
The construction of binary trumpet black hole initial data
Dr. Bai
Mathematical Institute, University of Bourgogne, Dijon

Talks from 2011-10-01 up to 2012-02-29
Thu, 2012-02-23 11:00
Dispersion forces: Analysis of local-field effects and inclusion of excitation
Agnes Samballe
Theoretisch-Physikalisches Institut, FSU Jena
Thu, 2012-02-16 14:00
Lecture course QFT in Curved Space-Time
Prof. Dr. Ilya Shapiro
Universidade Federal de Juiz de Fora, Juiz de Fora (Brasilien)
Tue, 2012-02-14 00:00(Hannover)
Semiannual Meeting
The SFB/TR7 semiannual meeting on 14th and 15th February, 2012
Thu, 2012-02-09 14:00
Effective Action and Renormalization Groups for QFT in Curved Space-Time, with applications to cosmology and astrophysics.
Prof. Dr. Ilya Shapiro
Universidade Federal de Juiz de Fora, Juiz de Fora (Brasilien)
Tue, 2012-02-07 16:00
Lecture course QFT in Curved Space-Time
Prof. Dr. Ilya Shapiro
Universidade Federal de Juiz de Fora, Juiz de Fora (Brasilien)
Mon, 2012-02-06 14:00
Resolving multiple supermassive black hole binaries with pulsar timing arrays
URZ 28 (SFB/TR7 Videoseminar)
Stanislav Babak or Alberto Sesana
AEI Potsdam
Mon, 2012-01-30 17:00(HS 2, Abbeanum)
Stabilität dynamischer mechanischer Systeme und der Lyapunov-Exponent
Dr. Jens Braun
Theoretisch-Physikalisches Institut, FSU Jena
Mon, 2012-01-30 14:00
Extreme-mass-ratio inspirals: Modeling eccentric orbits on Schwarzschild
Seth Hopper
AEI Potsdam
Wed, 2012-01-25 16:00
Applications of gauge/gravity duality
Prof. Dr. Johanna Erdmenger
Max-Planck-Institut für Physik, München
Mon, 2012-01-23 18:00(Aula)
Antrittsvorlesung: Organische Molek&uuml;le als Bausteine f&uuml;r die Nanoelektronik
Prof. Dr. Torsten Fritz
Institut für Festkörperphysik
Mon, 2012-01-23 14:00
Oscillations of relativistic tori and implications for modelling kHz-QPOs in neutron-star X-ray binaries
Pedro Montero
MPA Garching
Fri, 2012-01-20 16:00
Area-Angular Momentum-Charge inequalities for black hole horizons
Dr. Jose Luis Jaramillo
Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut Potsdam)
Thu, 2012-01-19 14:00
Lattice Study of Dense Matter: a Fugue in Two Colors
Prof. Simon Hands
University of Swansea, UK
Mon, 2012-01-16 17:00
Fermion Interactions and Universal Behavior in Strongly Interacting Theories
Dr. Jens Braun
Theoretisch-Physikalisches Institut, FSU Jena
Mon, 2012-01-16 14:00
The self-consistent field method for constructing stellar equilibria: when & why is convergence attained?
URZ 28 (SFB/TR7 Videoseminar)
Dr. Charalampos Markakis
FSU Jena
Fri, 2012-01-13 16:00
Black hole dynamics in generic space-times
Dip.-Phys. Helvi Witek
CENTRA/IST, Lissabon
Mon, 2012-01-09 17:00
Vorstellungsvortrag einer Habilitandin
Dr. Cornelia Jäger
Universität Jena, Institut für Festkörperphysik
Fri, 2012-01-06 16:00
How to reconstruct a metric by its unparameterized geodesics
Prof. Dr. Vladimir Matveev
Mathematisches Institut, FSU Jena,
Tue, 2011-12-20 16:00
Continuous Sequential Importance Sampling for Irreducible Diffusions
Dr. Krzysztof Latuszynski
University of Warwick, UK
Mon, 2011-12-19 16:00
Lösungen der Einstein-Maxwell-Gleichungen mit quasistatischen Übergängen zu Schwarzen Löchern (Verteidigung der Diplomarbeit)
Moritz Hütten
Theoretisch-Physikalisches Institut, Jena
Tue, 2011-12-13 16:00
Open Tractability Problems
Prof. Henryk Wozniakowski
Columbia University New York
Mon, 2011-12-12 17:00
Dunkle Materie in der galaktischen Sonnenumgebung? Wie man die Materiedichte in der Milchstraßenscheibe bestimmt
Prof. Dr. Oliver Schwarz
Universtität Siegen
Mon, 2011-12-12 14:00
Searching for non-Kerr compact objects
Dr. Georgios Loukes-Gerakopoulos
FSU Jena
Wed, 2011-12-07 16:30
Die Entwicklung der Fakultät
Prof. Dr. Bernd Brügmann und die Fachschaft der PAF
Wed, 2011-12-07 14:00(Seminarraum 308, Carl-Zeiß-Str. 3)
The dynamics of fast rotating and strongly magnetised relativistic stars
Prof. Dr.Kostas Kokkotas
Universität Tübingen
Tue, 2011-12-06 17:00
Numerical Simulations of Neutron Stars in General Relativistic Hydrodynamics
Marcus Thierfelder
Theoretisch-Physikalisches Institut, FSU Jena
Mon, 2011-12-05 14:00
Stratified and superconducting neutron star equilibria
Sam Lander
Universität Tübingen
Mon, 2011-11-28 16:00(SR 5, Helmholtzweg 4)
Magnetically driven superconductivity in rare earth intermetallics
Prof. Dr. Stefan Kirchner
Max-Planck-Institut für Physik komplexer Systeme, Dresden
Mon, 2011-11-28 14:00
The connection between missing stellar cusps in galactic nuclei and general relativity
Pau Amaro Seoane
AEI Potsdam
Wed, 2011-11-23 16:00
Simulation of quantum vacuum processes in ultra-intense laser fields
Prof. Dr. Hartmut Ruhl
LMU München
Tue, 2011-11-22 07:00
Hit-and-run for numerical integration
Dr. Daniel Rudolf
Mathematisches Institut, FSU Jena
Mon, 2011-11-21 14:00
Numerical resistivity and viscosity
Tomasz Rembiasz
MPA Garching
Fri, 2011-11-18 16:00
On the integrability of the geodesic flows of stationary axisymmetric vacuum spacetimes
Prof. Dr. V. Matveev
Mathematisches Institut, FSU Jena
Thu, 2011-11-17 14:00
The spectrum of and forces between B mesons from lattice QCD
Prof. Dr. Marc Wagner
Goethe-Universität Frankfurt am Main
Tue, 2011-11-15 16:00
Spherically symmetric constant negative scalar curvature 3-manifolds: or, more than one wants to know about solutions to &nabla;2&Phi; - &Phi;5 = 0
Prof. Niall &Oacute; Murchadha
University College Cork, Ireland
Mon, 2011-11-14 18:00(Aula der FSU)
Physik der Biomaterialien: Composites auf den Zahn gefühlt
Prof. Dr. David C. Watts
University of Manchester, UK
Mon, 2011-11-14 14:00
Black hole on a GPU
Bernd Brügmann,
FSU Jena
Thu, 2011-11-10 11:00
Magnetospheres of compact objects in Force-Free Plasma
Dr. Ruiz
University of the Balearic Islands
Tue, 2011-11-08 17:00
Motion and gravitational wave emission of spinning compact binaries
Manuel Tessmer
Theoretisch-Physikalisches Institut, FSU Jena
Mon, 2011-11-07 14:00
New design, new movie - how do we want to present our work through the transregio outreach project? An overview a request for feedback and input.
Hans-Peter Nollert,
Universtität Tübingen
Tue, 2011-11-01 16:00
Many-Body Perturbation Theory for Electronic Excitations
Prof. Giancarlo Cappellini
Cagliari University
Thu, 2011-10-27 17:00(HS 2, Helmholtzweg 5)
Approximation des äußeren Gravitationsfeldes rotierender Neutronensterne durch exakte Lösungen der EINSTEIN-Gleichungen
Christian Liutik (geb.Teichmüller)
Theoretisch-Physikalisches Institut, FSU Jena
Tue, 2011-10-25 16:15(SR 5, Helmholtzweg 4)
"Hunting Strings at LHC"
Dr. Oliver Schlotterer
AEI Potsdam
Mon, 2011-10-24 17:00
Thermodynamics of small systems
Prof. Dr. Andreas Engel,
Universität Oldenburg
Mon, 2011-10-24 14:00
"Maximum elastic deformations of relativistic stars"
Nathan Johnson-McDaniel
FSU Jena
URZ 28
Wed, 2011-10-19 16:00
Phases of QCD and Nuclear Chiral Thermodynamics
Prof. Dr. Wolfram Weise,
TU München
Mon, 2011-10-17 17:00(HS 4, Abbeanum)
Wie man Elementarteilchen beschreibt (Vortrag im Rahmen eines Umhabilitationsverfahrens
Dr. Axel Maas
Universität Jena, Theoretisch-Physikalisches-Institut
Thu, 2011-10-06 15:00
Complex singularities in finite density QCD
Prof. Dr. Hiroshi Yoneyama
Universität Saga, Japan


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