[Seminar] "JTbar deformed CFT2 and string theory" by Soumangsu Chakraborty

Speaker: Soumangsu Chakraborty, Hebrew University of Jerusalem
Title: "JTbar deformed CFT2 and string theory"
 

Mathematical Physics seminar: Chern-Simons theory

Joint Math and Theoretical physics seminar on Chern-Simons theory, Knot invariants and Volume conjecture. Vyacheslav Lysov will be leading the discussion.

[Seminar] "Flow equation, conformal symmetry and AdS geometries" by Dr. Shuichi Yokoyama

Speaker: Dr. Shuichi Yokoyama, Kyoto University

Kyoto/NTU/OIST Fundamental Theory Workshop

Joint High Energy Theory workshop between Kyoto University, National Taiwan University and OIST. Additional external speakers are Song He, Eugene Skvortsov, Julian Sonner and Kazuya Yonekura.
Program & Schedule in attached PDF.

QG group meeting: Black hole microstate counting for BTZ black hole

Quantum Gravity Group Meeting

Title: Black hole microstate counting for BTZ black hole

Speaker: Vyacheslav Lysov, Quantum Gravity Unit (Neiman)

QG group meeting: Conformal Bootstrap at Finite Temperature

Quantum Gravity Group Meeting:

Title: Conformal Bootstrap at Finite Temperature 

Speaker: Sudip Ghosh, Quantum Gravity Unit (Neiman)

[Seminar] "Vacuum decay rate in the standard model and beyond" by Dr. Yutaro Shoji

Speaker: Dr. Yutaro Shoji from Nagoya University

Abstract:
The electroweak vacuum is not absolutely stable in the standard model and various models beyond the standard model. This is due to an appearance of another deeper vacuum, into which the electroweak vacuum can decay. The decay proceeds through quantum tunneling and the rate is expressed with an exponential suppression factor and a pre-factor. The suppression factor has been calculated in many papers, but a naive dimensional analysis has been usually adopted for the pre-factor.

We have pointed out that such an evaluation can suffer from large quantum corrections and it is important to calculate the pre-factor as well.

To calculate the pre-factor, we had problems in a gauge sector; its gauge invariance is not explicitly shown, and there appear zero modes, which we could not deal with.

We have solved these problems and made it possible to determine vacuum decay rates precisely.

As applications, we analyzed the decay rates in the standard model and its fermionic extensions. We also provide a public code, which can be used for models that exhibit classical scale invariance at a high energy scale.

QG group meeting: Fluid/gravity correspondence

This is the weekly QG group meeting.

Speaker: Vyacheslav  Lysov 

Title: Fluid/Gravity Correspondence 

Journal club seminar: Geometry of Complexity

Discussion  by Vyacheslav Lysov on Geometry of Complexity.

QG group meeting: null hypersurface geometry

QG group meeting
Speaker: Yasha Neiman
Title: Introduction to the geometry of null hypersurfaces