Chennai Mathematical Institute


Physics Seminar
Date and Time: 2 pm, Tuesday 30, August 2022.
Venue: Lecture Hall 801
Memory effects: studies in exact radiative spacetimes

Indranil Chakraborty
IIT Kharagpur.


Following recent work [Zhang, Duval, Gibbons, and Horvathy (PRD, 2017)], there has been growing interest in understanding memory effects by studying geodesic motion. One can, in principle, arrive at a class of memory effects (displacement and velocity memory) by solving the geodesic equation or the equation of geodesic deviation. Another route to memory (also called B-memory) involves studying geodesic congruences by utilizing the Raychaudhuri equation. In this talk, we will provide an overview of our recent work on such diverse aspects of memory in the context of exact, radiative solutions in General Relativity and modified theories of gravity.

Reference: The talk will be based on the following papers, arXiv:1901.11236, 2005.00245, 2011.12368, 2202.10661