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The University of Southampton
STAG Research Centre

String Theory seminar - Andrea Puhm Seminar

Time:
13:00
Date:
2 November 2022
Venue:
Building 2, Room 1083 (Lecture Theatre B)

For more information regarding this seminar, please email David Turton at [email protected] .

Event details

Title: Celestial holography on non-trivial backgrounds

Abstract: The holographic principle is a powerful tool in gaining insight into quantum gravity for spacetimes with a negative cosmological constant, but it is an outstanding question how generally it applies. I will review recent advances in celestial holography which conjectures that quantum gravity in spacetimes with flat asymptotics is dual to a co-dimension two conformal field theory on the celestial sphere at null infinity. Recasting the S-matrix, which is the basic observable in quantum gravity, in a basis of boost (rather than energy) eigenstates indeed reveals similarities with CFT correlation functions. I will highlight several intriguing and some puzzling features and discuss celestial holography for general spacetime dimensions and for non-trivial asymptotically flat backgrounds of Kerr-Schild type which include the Coulomb field of a static and spinning charge, the Schwarzschild and Kerr geometry as well as electromagnetic and gravitational shockwaves.

Speaker information

Andrea Puhm , Ecole Polytechnique, CPHT.

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