par Detournay, Stéphane ;Smoes, Thomas ;Wutte, Raphaela
Référence SciPost Physics, 16, 5, 141
Publication Publié, 2024-05
Article révisé par les pairs
Résumé : 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.