of the Institute of Theoretical Physics

- March 1, 2011
- Conformal Killing-Yano symmetry in the presence of skew-symmetric torsion
*dr. Tsuyoshi Houri*- Osaka City University, Advanced Mathematical Institute
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]

- March 8, 2011
- Thermodynamic volume of black holes and reverse isoperometric inequality
*dr. David Kubizňák*- DAMTP, University of Cambridge
- March 15, 2011
- Higher dimensional Kerr-Schild space-times with anti-de Sitter background
*Tomáš Málek*- Matematický ústav AV ČR
- (seminar in Czech language)
- March 22, 2011
- Seminář se nekoná
- (seminar in Czech language)
- March 29, 2011
- Dynamics of young stars in a galactic nucleus
*Mgr. Jaroslav Haas, dr. Ladislav Šubr, prof. David Vokrouhlický*- Astronomický ústav, MFF UK
- (seminar in Czech language)
- April 5, 2011
- Testing gravity with cosmology - II
*Dr. Constantinos Skordis*- School of Physics and Astronomy, University of Nottingham
- April 12, 2011
- Geometrical properties of the Szekeres model and its applications in cosmology
*David Vrba*- ITP
- (seminar in Czech language)
- April 19, 2011
- Dynamics of young stars in a galactic nucleus
*Mgr. Jaroslav Haas, dr. Ladislav Šubr, prof. David Vokrouhlický*- Astronomický ústav, MFF UK
- (seminar in Czech language)
- April 26, 2011
- !!! KONÁ SE JAKO SEMINÁŘ ÚTF OD 10:00 !!!
- Using numerical relativity to explore fundamental physics and astrophysics
*prof. Luciano Rezzolla*- Albert-Einstein Institute, Max-Planck Institute for Gravitational Physics, Potsdam
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.

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

- June 14, 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

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