Orateur
Prahar Mitra
(University of Amsterdam)
Description
Holography in asymptotically flat spacetimes has received much attention recently and has been significantly developed along several different fronts. In one formulation known as celestial holography, quantum gravity in $d+2$-dimensional asymptotically flat spacetimes can be reformulated as a conformal field theory that lives on the $d$-dimensional celestial sphere. In this mini-lecture series, I will introduce the basics of celestial holography, starting with an identification of the relevant symmetries of the problem, Ward identities and their relationship to soft theorems, and ending with a discussion of celestial CFTs and their structure.
(part 1)
