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Calendar of Physics Talks Vienna
| The functorial axiomatization of topological quantum field theory (Vienna Theory Lunch Seminar) |
| Speaker: | Tim Lüders (Universität Wien) |
| Abstract: | In this talk, I will give a lightning introduction to topological quantum field theory in its functorial axiomatization, due to Atiyah and Segal. We start by exploring the very basics of the mathematical discipline of category theory, which will then be used as a convenient tool to package essential properties of FeynmanâÂÂs path integral into a mathematically rigorous framework. Examples of physical theories that can be described in this setting include Chern-Simons theory as well as topological sigma and state sum models. I will finish the talk by mentioning several natural generalizations of the introduced mathematical structures, and what physical interest each of them carries.
[[part of the "Vienna Theory Lunch Seminar, see https://lunch-seminar.univie.ac.at ]] |
| Date: | Tue, 05.03.2024 |
| Time: | 12:30 |
| Duration: | 75 min |
| Location: | University of Vienna, Boltzmanngasse 5, 5th floor, Schrödinger Lecture Hall |
| Contact: | Florian Lindenbauer |
| Quasinormal modes of black holes in classical and alternative theories of gravity |
| Speaker: | Angel Rincon (Universidad de Alicante) |
| Abstract: | 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. |
| Date: | Tue, 05.03.2024 |
| Time: | 14:00 |
| Duration: | 60 min |
| Location: | Erwin Schroedinger-Hoersaal (Boltzmanngasse 5, 5th floor) |
| Contact: | Adrien Fiorucci, Benjamin Koch, Daniel Grumiller |
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