IPM Calendar 
Saturday 8 August 2020   Today  
Events for day: Thursday 02 July 2020    
           08:30 - 09:30     IPM holography virtual seminar
3d gravity from averaging 2d CFTs


Abstract: We study the torus partition functions of free compatic bosonic CFTs in two dimensions. Integrating over Narain moduli defines an ensemble-averaged free CFT. We calculate the averaged partition function and show that it can be reinterpreted as a sum over topologies in three dimensions. This result leads us to conjecture that an averaged free CFT in two dimensions is holographically dual to an exotic theory of three-dimensional gravity.

           11:00 - 12:00     Theory Weekly Seminar (TWS)-skyroom
Deformation of Asymptotic/Near horizon Symmetry Algebras


Abstract: In this talk, I would like to review the concept of contraction, deformation, and stabilization of finite and infinite-dimensional Lie algebras. Then, I will consider the deformation of infinite-dimensional Lie algebras which are obtained as asymptotic/near horizon symmetry algebras in gravitational physics. Finally, I will present the physical realization of obtained algebras through deformation procedure.

https://www.skyroom.online/ch/ipm-particles/theory-weekly-seminar ...

           15:00 - 17:00     Weekly Seminar
Foundations of Physics Group
Helicity, spin and duality symmetry in classical field theories


Helicity and spin as conserved quantities have been considered vastly in recent years, especially in the fields of optics and fluid dynamics. In contrast to what is usually thought, helicity and spin of the electromagnetic fields are definable and useful at the classical level as well as the quantum level. The classical quantities have the expected relation with their quantum counterparts. Besides, it has been clarified to a certain extent that the separation of the total angular momentum of light into orbital and intrinsic (spin) parts leads to meaningful and consistent definitions of these independently conserved quantities ...