A Hologram on Celestial Sphere

Speaker: Tomasz TAYLOR
(
  • Northeastern University
)

Abstract

Abstract:

Celestial sphere is the sphere of all directions in the sky. When two relativistic observers compare snapshots of the night sky, they find them related by conformal transformations. According to a novel proposal of flat spacetime holography, four-dimensional physics is encoded in the properties of two-dimensional conformal field theory describing celestial sphere at null infinity. In this framework, the scattering amplitudes of elementary particles are represented by conformal correlation functions. Well-known soft theorems appear as Ward identities reflecting asymptotic symmetries. This may offer new insights into some mysterious connections between gauge theories and gravity.

Apr242020

A Hologram on Celestial Sphere

Higgs Centre Colloquium
Higgs Centre Seminar Room, JCMB
The Higgs Centre for Theoretical Physics
School of Physics and Astronomy
James Clerk Maxwell Building
Peter Guthrie Tait Road
Edinburgh
EH9 3FD
UK