The University of Southampton
University of Southampton Institutional Repository
Warning ePrints Soton is experiencing an issue with some file downloads not being available. We are working hard to fix this. Please bear with us.

Cosmic branes and asymptotic structure

Cosmic branes and asymptotic structure
Cosmic branes and asymptotic structure
Superrotations of asymptotically flat spacetimes in four dimensions can be interpreted in terms of including cosmic strings within the phase space of allowed solutions. In this paper we explore the implications of the inclusion of cosmic branes on the asymptotic structure of vacuum spacetimes in dimension d > 4. We first show that only cosmic (d-3)-branes are Riemann flat in the neighbourhood of the brane, and therefore only branes of such dimension passing through the celestial sphere can respect asymptotic local flatness. We derive the asymptotically locally flat boundary conditions associated with including cosmic branes in the phase space of solutions. We find the asymptotic expansion of vacuum spacetimes in d=5 with such boundary conditions; the expansion is polyhomogenous, with logarithmic terms arising at subleading orders in the expansion. The asymptotically locally flat boundary conditions identified here are associated with an extended asymptotic symmetry group, which may be relevant to soft scattering theorems and memory effects.
1029-8479
Capone, Federico
9c2503c3-611d-482a-9d84-46e1eaa36ed7
Taylor, Marika
5515acab-1bed-4607-855a-9e04252aec22
Capone, Federico
9c2503c3-611d-482a-9d84-46e1eaa36ed7
Taylor, Marika
5515acab-1bed-4607-855a-9e04252aec22

Capone, Federico and Taylor, Marika (2019) Cosmic branes and asymptotic structure. Journal of High Energy Physics, (138). (doi:10.1007/JHEP10(2019)138).

Record type: Article

Abstract

Superrotations of asymptotically flat spacetimes in four dimensions can be interpreted in terms of including cosmic strings within the phase space of allowed solutions. In this paper we explore the implications of the inclusion of cosmic branes on the asymptotic structure of vacuum spacetimes in dimension d > 4. We first show that only cosmic (d-3)-branes are Riemann flat in the neighbourhood of the brane, and therefore only branes of such dimension passing through the celestial sphere can respect asymptotic local flatness. We derive the asymptotically locally flat boundary conditions associated with including cosmic branes in the phase space of solutions. We find the asymptotic expansion of vacuum spacetimes in d=5 with such boundary conditions; the expansion is polyhomogenous, with logarithmic terms arising at subleading orders in the expansion. The asymptotically locally flat boundary conditions identified here are associated with an extended asymptotic symmetry group, which may be relevant to soft scattering theorems and memory effects.

Text
1904.04265 - Accepted Manuscript
Download (893kB)

More information

Accepted/In Press date: 17 September 2019
e-pub ahead of print date: 10 October 2019
Published date: 10 October 2019

Identifiers

Local EPrints ID: 434678
URI: http://eprints.soton.ac.uk/id/eprint/434678
ISSN: 1029-8479
PURE UUID: fddda5e6-45b2-4ed2-a347-78855a6cf545
ORCID for Marika Taylor: ORCID iD orcid.org/0000-0001-9956-601X

Catalogue record

Date deposited: 04 Oct 2019 16:30
Last modified: 22 Nov 2021 03:02

Export record

Altmetrics

Contributors

Author: Federico Capone
Author: Marika Taylor ORCID iD

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×