|
Calendar of Physics Talks Vienna
| An introduction to functorial TQFT with defects |
| Speaker: | Nils Carqueville (Universität Wien) |
| Abstract: | I'll review the functorial approach to 2-dimensional topological quantum field theory (TQFT). After introducing some of the main ingredients, ideas and examples in the closed sector, we'll move on to TQFTs with boundary conditions and other defects. This is the natural setting in which a generalised orbifold procedure takes place, which unifies the gauging of finite symmetry group actions with state sum models, and uncovers new dualities. Time permitting, we'll end with an outlook on defects and orbifolds in higher dimensions.
This talk is part of the Heidelberg-München-Wien online seminar on mathematical physics. |
| Date: | Mon, 18.05.2020 |
| Time: | 16:15 |
| Duration: | 60 min |
| Location: | https://bbb.nt.tuwien.ac.at/b/nil-62h-f4a, open from 4:00 pm |
| Contact: | Nils Carqueville |
| (Quantum) Higher Spin Gravity and applications to Physics |
| Speaker: | Evgeny Skvortsov (Albert Einstein Institute) |
| Abstract: | I will give a general overview of Higher Spin Gravities and also discuss the recent developments
that give a class of models where UV-divergences of Einstein gravity cancel out thanks to the higher spin symmetry.
At the end I will discuss the relation between Higher Spin Gravities and a class of conformal field theories in three dimensions
that describe the physics of many second order phase transitions in the real world and have been recently conjectured to exhibit a number
of remarkable dualities, in particular the three-dimensional bosonization duality. I will show how Higher Spin Gravity can help to prove the dualities
and how it makes new predictions. The relation to QCD and self-dual Yang-Mills will also be discussed. |
| Date: | Tue, 19.05.2020 |
| Time: | 13:45 |
| Duration: | 60 min |
| Location: | zoom |
| Contact: | D. Grumiller, S. Fredenhagen |
| GENEVA Monte Carlo: status and new developments |
| Speaker: | Simone Alioli (University of Milan Bicocca) |
| Abstract: | I will review the GENEVA framework, that combines the NNLL resummation of large Sudakov logarithms at small values of the jet resolution variable with multiple NLO matrix-element corrections at larger values, to give a complete description at the next higher perturbative accuracy in the strong coupling constant at both small and large jet resolution scales. Recent results for new color-singlet processes and extensions to handle corrections to both production and decay will also be discussed. |
| Date: | Tue, 19.05.2020 |
| Time: | 16:15 |
| Location: | zoom - please ask organizers for link and password |
| Contact: | André Hoang, Simon Plätzer, Massimiliano Procura |
| Families of Hitchin systems, N=2 theories and the Deligne-Simpson problem |
| Speaker: | Aswin Balasubramanian (Rutgers University) |
| Abstract: | Motivated by the relation to 4d N=2 theories, I will describe tame SL_N Hitchin integrable systems as flat families over \bar{M}, the Deligne-Mumford moduli space associated to the underlying Riemann surface. Then, I will use this description to clarify certain questions about the behaviour of the Coulomb branches of these N=2 theories near the boundaries of \bar{M}. As a further application of the setup, I will describe an interesting relationship between Class S theories and a particular instance of the Deligne-Simpson problem. This is based on upcoming work with J. Distler and R. Donagi. |
| Date: | Wed, 20.05.2020 |
| Time: | 15:00 |
| Duration: | 60 min |
| Location: | Zoom (please contact abhiram.kidambi[AT]tuwien.ac.at for details) |
| Contact: | Abhiram Kidambi |
|