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Title (deu)
The Case Against Smooth Null Infinity and the Persistence of Polyhomogeneity
Speaker / Lecturer
Leonhard Kehrberger
U of Cambridge
Description (deu)
In this talk, I will describe recent and upcoming work on the asymptotic behaviour of gravitational radiation (linearised gravity around Schwarzschild) in a neighbourhood of spacelike infinity including past and future null infinity. I will first set up a mathematical scattering framework in which one can understand the question of smoothness of null infinity on physical grounds. I will then use this framework to present a basic sketch of the proof of the irregularity of null infinity in various physically motivated settings, together with a complete description of the semiglobal asymptotics of gravitational radiation one obtains instead. In particular, I will discuss how a class of asymptotic conservation laws related to the Newman-Penrose charges can be used to infer the asymptotics for fixed angular modes, and describe how to use a persistence of polyhomogeneity result to sum up the individual angular modes. Based on joint work with Hamed Masaood and Istvan Kadar.
Keywords (deu)
Carrollian PhysicsHolography
Subject (eng)
ÖFOS 2012 -- 103 -- Physics, Astronomy
Type (eng)
lecture
Language
[eng]
Persistent identifier
https://phaidra.univie.ac.at/o:2063373
Date created
2024-04-17
Place of creation (eng)
ESI
Duration
1 hours 12 minutes
Association (eng)
Research Platform Erwin Schrödinger International Institute for Mathematical Physics (ESI)
License
All rights reserved