05.03.2024 | UV | Quasinormal modes of black holes in classical and alternative theories of gravity | Angel Rincon | In this talk, we study neutral massless/massive scalar field perturbations around different black hole backgrounds in several dimensions. We reduce the problem to its Schroedinger-like form, obtain the effective potential, and then calculate the corresponding quasinormal modes. For well-behaved black holes, we take advantage of the WKB method to obtain the spectrum. As usual, the quasinormal modes depend on the parameters of the black hole, so by varying them we can see how their variations affect the Quasi Normal frequencies. |
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12.03.2024 | Rector's day | |||
19.03.2024 | UV | Covariant charges and fluxes at null infinity | Antoine Rignon-Bret | In this talk, I will review the application of Noether theorem to general relativity and the covariant phase space techniques to construct Noether charges and fluxes on spacetime boundaries. In particular, I will detail the Wald-Zoupas procedure and focus on the physical interpretation. I will show that the implementation of the procedure implies that the algebra of local Noether currents is free of cocycle. Then, I will focus on non-trivial examples at null infinity. I will implement the Wald-Zoupas procedure for BMS and eBMS boundary conditions, and argue that it cannot be implemented successfully for generalized BMS fall-off conditions but for a symmetry group preserving different fall off conditions isomorphic to gBMS with a different algebra. |
26.03.2024 | Easter break | |||
02.04.2024 | Easter break | |||
09.04.2024 | TU | title | speaker | abstract |
16.04.2024 | UV | title | speaker | abstract |
23.04.2024 | TU | title | speaker | abstract |
30.04.2024 | UV | title | Abhiram KIDAMBI | abstract |
07.05.2024 | UV | title | Marcus Sperling | abstract |
14.05.2024 | TU | title | Michele Del Zotto | abstract |
21.05.2024 | UV | Pentecost | ||
28.05.2024 | UV | title | speaker | abstract |
04.06.2024 | TU | title | speaker | abstract |
11.06.2024 | UV | title | speaker | abstract | 18.06.2024 | UV | title | speaker | abstract | 15.06.2024 | UV | title | speaker | abstract |
The Joint Theory Seminar is held alternately at the University of Vienna and the Technische Universität Wien, either on site or online via Zoom.
The Topic of the seminar is recent theoretical research in the areas of mathematical physics, high energy physics, physics of fundamental interactions and particle physics.
The target audience for the talks are PhDs, postdocs and faculty members.
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Anyone can attend. To receive the link to the Zoom meeting please contact one of the organizers.
If you want to give a talk contact Adrien Fiorucci or Tung Tran.
Black holes and holography
Technische Universität Wien
Mathematical physics
University of Vienna
Black holes and holography
Technische Universität Wien
Mathematical physics
University of Vienna