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".

Journal club seminar: Implications of Symmetry and Pressure in Friedmann Cosmology

Title: Implications of Symmetry and Pressure in Friedmann Cosmology

Abstract: We will continue the discussion of the recent paper by K. S. Croker and J. L. Weiner    "Implications of Symmetry and Pressure in Friedmann Cosmology". Carlos Octavio Villalpando Vargas will be leading the discussion. 

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

Journal club seminar: Unitarity Methods in AdS/CFT

Title: Unitarity methods in AdS/CFT

Abstract: We are going to discuss the recent paper by David Meltzer , Eric Perlmutter and Allic Sivaramakrishnan  "Unitarity methods in AdS/CFT". Sudip Ghosh will be leading the discussion. 

QG group meeting: Symplectic reduction, asymptotic symmetries and edge modes

This is the weekly QG group meeting.
Speaker: Slava Lysov
Title: "Symplectic reduction, asymptotic symmetries and edge modes"

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"

Journal club seminar: Batalin-Vilkoviski formalism and applications

Speaker: Slava Lysov

Title: Batalin-Vilkoviski formalism and applications.

Abstract : I am going to rewiev the Batalin-Vilkoviski (BV) formalinsm and discuaa some applications of it. The releveant papers are: classical paper on BV by A. Schwarz  "Geometry of Batalin-Vilkovisky quantization" and the paper by Gorodentsev, Krotov and Losev "Quantum Field Theory as Effective BV Theory from Chern-Simons".