Memory in de Sitter space and BMS-like supertranslations
High Energy Physics - Theory
2017-07-14 v2 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
It is well known that the memory effect in flat spacetime is parametrized by the BMS supertranslation. We investigate the relation between the memory effect and diffeomorphism in de Sitter spacetime. We find that gravitational memory is parametrized by a BMS-like supertranslation in the static patch of de Sitter spacetime. We also show a diffeomorphism that corresponds to gravitational memory in the Poincare/cosmological patch. Our method does not need to assume the separation between the source and the detector to be small compared with the Hubble radius, and can potentially be applicable to other FLRW universes, as well as "ordinary memory" mediated by massive messenger particles.
Keywords
Cite
@article{arxiv.1702.06928,
title = {Memory in de Sitter space and BMS-like supertranslations},
author = {Yuta Hamada and Min-Seok Seo and Gary Shiu},
journal= {arXiv preprint arXiv:1702.06928},
year = {2017}
}
Comments
19 pages, 1 figures, published version