Relativistický seminář
Ústavu teoretické fyziky

jaro 2011

Proběhlé semináře:

1. března 2011
Conformal Killing-Yano symmetry in the presence of skew-symmetric torsion
dr. Tsuyoshi Houri
Osaka City University, Advanced Mathematical Institute
(seminář v angličtině)

Conformal Killing-Yano (CKY) symmetry has been studied as a fundamental hidden symmetry which plays a crucial role in black hole spacetimes. In this talk, after reviewing the history of CKY symmetry in four dimensions, I would like to present a generalization to higher dimensions and its applications. I further talk about CKY symmetry in the presence of skew-symmetric torsion. You will see that such a symmetry appears in black hole spacetimes of supergravity theories and that the torsion is naturally identified with a 3-form occuring in the theories. Finally, I would like to talk about recent progress if time permits. Ref. JHEP07(2010)055[arXiv:1004.1032]

8. března 2011
Thermodynamic volume of black holes and reverse isoperometric inequality
dr. David Kubizňák
DAMTP, University of Cambridge
(seminář v angličtině)

I will introduce a simple idea how to define the volume of certain black holes, based entirely on thermodynamic considerations. I will present explicit expressions for the thermodynamic volume for a wide variety of black hole spacetimes and compare them with the "geometric volume" defined in previous studies. Finally, I will demonstrate that, at least phenomenologically, the thermodynamic volume seems to posses more universal properties. In particular, it seems to obey the reverse isoperometric inequality.

15. března 2011
Higher dimensional Kerr-Schild space-times with anti-de Sitter background
Tomáš Málek
Matematický ústav AV ČR
22. března 2011
Seminář se nekoná
29. března 2011
Dynamika mladých hvězd v jádře Galaxie
Mgr. Jaroslav Haas, dr. Ladislav Šubr, prof. David Vokrouhlický
Astronomický ústav, MFF UK
5. dubna 2011
Testing gravity with cosmology - II
Dr. Constantinos Skordis
School of Physics and Astronomy, University of Nottingham
(seminář v angličtině)
12. dubna 2011
Geometrické vlastnosti Szekeresova modelu a jeho aplikace v kosmologii
David Vrba
19. dubna 2011
Dynamika mladých hvězd v jádře Galaxie - II
Mgr. Jaroslav Haas, dr. Ladislav Šubr, prof. David Vokrouhlický
Astronomický ústav, MFF UK
26. dubna 2011
Using numerical relativity to explore fundamental physics and astrophysics
prof. Luciano Rezzolla
Albert-Einstein Institute, Max-Planck Institute for Gravitational Physics, Potsdam
(seminář v angličtině)

Recent years have seen a major progress in numerical relativity and the solution of the simplest and yet among the most challenging problems in classical general relativity: that of the evolution of two objects interacting only gravitationally. I will review the results obtained so far when modelling binaries of black holes or of neutron stars and also discuss the impact these studies have in detection of gravitational-waves, in astrophysics, and in our understanding of general relativity.

3. května 2011
A class of exact solutions to quadratic gravity
Mgr. Tomáš Málek
Matematický ústav AV ČR
10. května 2011
Seminář se nekoná
17. května 2011
beseda o studiu (astrofyziky) v Americe
Mgr. Ondřej Pejcha
Department of Astronomy, Ohio State University, Columbus, USA
24. května 2011
Seminář se nekoná
31. května 2011
The wave equation on space-times of low regularity
Prof. Roland Steinbauer
Department of Mathematics, University of Vienna
(seminář v angličtině)

We consider the wave operator $\box_g=g^{ab}\nabla_a\nabla_b$ on Lorentzian manifolds where the metric $g$ is of low regularity. After recalling the classical theory of the wave equation on space-time we turn to the case of rough metrics. We present a local existence and uniqueness result for essentially bounded metrics based on the nonlinear distributional geometry in the sense of J.F. Colombeau. Finally, we extend this result to a global well-posedness theorem on (suitably generalized) globally hyperbolic space-times of low regularity.

14. června 2011
mimořádný seminář na dvě témata
1) Emergent spacetime in superfluid Helium
2) Quasinormal modes in 2D black holes
Andrei Zelnikov
University of Alberta, Canada
(seminář v angličtině)

Další ročníky:

© 27. února 2012; Oldřich Semerák <>
© 2. října 2022; vygenerováno pomocí aplikace seminar, verze 2.04 (2003-09-02); správce <>