Group Meeting Talk: BMS Symmetry and OPE of Celestial CFTs

Title : BMS Symmetry and OPE of Celestial CFTs

Speaker: Sudip Ghosh

Abstract: The holographic dual of quantum gravitational theories in asymptotically flat spacetimes has recently been conjectured to be the so called celestial conformal field theories whose correlation functions are Mellin transforms of bulk scattering amplitudes. In this talk I will discuss aspects of a derivation of the OPE in these CFTs from the collinear singularities of graviton scattering amplitudes and the constraints of BMS symmetries on the OPE coefficients. 

Theoretical Physics Seminar: Alistair Graham

Theoretical Physics Seminar.
Speaker: Alistair Graham (Quantum Gravity).
Title: "Measuring Chaos in General Relativity".

Group Meeting Talk: Implications of Symmetry and Pressure in Friedmann Cosmology

Title:  Implications of Symmetry and Pressure in Friedmann Cosmology

Speaker: Vilalpando Vargas Carlos Octavio

[Seminar] "Surface operators in N=2 SQCD and Seiberg Duality" by Sourav Ballav

Speaker: Sourav Ballav from The Institute of Mathematical Sciences, Chennai, India

[Seminar] "Classical soft theorem in four dimension" by Dr. Arnab Priya Saha

Speaker: Dr. Arnab Priya Saha, Harish-Chandra Research Institute, India

QG group meeting - the hidden heavy particles in higher-spin gravity

This is the weekly QG group meeting.
Speaker: Yasha Neiman
Title: "The hidden heavy particles in higher-spin gravity"

Seminar "Tensionless Strings from worldsheet perspective" by Dr. Aritra Banerjee

Speaker: Dr. Aritra Banerjee, APCTP, South Korea

[Seminar] "Out of time ordered effective dynamics of a quartic oscillator" by Dr. Bidisha Chakrabarty

Speaker: Dr. Bidisha Chakrabarty, ICTS-TIFR

Theoretical Physics Seminar: Seva Nikulin

Theoretical Physics Seminar.
Speaker: Seva Nikulin.
Title: "De Sitter space as a space of probability distributions".

[Seminar] "Making string theory great again" by Prof. Eoin Ó Colgáin

Speaker: Prof. Eoin Ó Colgáin from APCTP