Boundary conditions for extremal black holes from 2d gravity

Detournay, Stephane, Smoes, Thomas and Wutte, Raphaela (2024) Boundary conditions for extremal black holes from 2d gravity. SciPost Phys., 16, [141]. (doi:10.21468/SciPostPhys.16.5.141).

Record type: Article

Abstract

We devise new boundary conditions for the near-horizon geometries of extremal BTZ and Kerr black holes, as well as for the ultra-cold limit of the Kerr-de Sitter black hole. These boundary conditions are obtained as the higher-dimensional uplift of recently proposed boundary conditions in two-dimensional gravity. Their asymptotic symmetries consist in the semi-direct product of a Virasoro and a current algebra, of which we determine the central extensions.

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Accepted/In Press date: 13 May 2024

e-pub ahead of print date: 30 May 2024

Published date: 30 May 2024

Identifiers

Local EPrints ID: 512844

URI: https://eprints.soton.ac.uk/id/eprint/512844

DOI: doi:10.21468/SciPostPhys.16.5.141

ISSN: 2542-4653

PURE UUID: 12fd2bbb-5f3f-4fb8-8d3a-1025dd8b3d24

ORCID for Raphaela Wutte:

orcid.org/0000-0002-1346-1047

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Date deposited: 24 Jul 2026 16:43

Last modified: 13 Sep 2026 15:49

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Contributors

Author: Stephane Detournay

Author: Thomas Smoes

Author: Raphaela Wutte

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