Radiation in Holography

You are here: University of Vienna PHAIDRA Detail o:2064267

Open in new window

Title (deu)

Speaker / Lecturer

Sabrina Pasterski

Perimeter Institute, Waterloo

Description (deu)

We show how to encode the radiative degrees of freedom in 4-dimensional asymptotically AdS spacetimes, using the boundary Cotton and stress tensors. Background radiation leads to a reduction of the asymptotic symmetry group, in contrast to asymptotically flat spacetimes, where a non-vanishing news tensor does not restrict the asymptotic symmetries. Null gauges, such as Λ-BMS, provide a framework for AdS spacetimes that include radiation in the flat limit. We use this to check that the flat limit of the radiative data matches the expected definition in intrinsically asymptotically flat spacetimes. We further dimensionally reduce our construction to the celestial sphere, and show how the 2-dimensional celestial currents can be extracted from the 3-dimensional boundary data.

Keywords (deu)

Carrollian PhysicsHolography

Subject (eng)

ÖFOS 2012 -- 103 -- Physics, Astronomy

Type (eng)

lecture

Language

[eng]

Persistent identifier

https://phaidra.univie.ac.at/o:2064267

Date created

2024-04-22