Complex BPS Black Holes in AdS$_3\times S^3$

Fuente: arXiv
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Main Authors: Larsen, Finn, Sharma, Kartik
Format: Preprint
Published: 2026
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author Larsen, Finn
Sharma, Kartik
author_facet Larsen, Finn
Sharma, Kartik
contents The correct gravitational representation of the supersymmetric index is a smooth complex solution, rather than the na\"ıve Euclidean continuation of the Lorentizan BPS black hole. We construct such saddles for black holes with \(\mathrm{AdS}_3\times S^3\) boundary conditions in the STU model. We arrive at the same finite-temperature BTZ \(\times S^3\) geometries in two independent ways: from two-center four-dimensional BPS solutions with complex dipole charges, and from six-dimensional black strings after imposing the BPS relation among conserved charges. We analyze the resulting smoothness and periodicity conditions and show that they are precisely those required for globally well-defined supersymmetry and for the thermodynamic potentials of the supersymmetric index.
format Preprint
id arxiv_https___arxiv_org_abs_2605_28737
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Complex BPS Black Holes in AdS$_3\times S^3$
Larsen, Finn
Sharma, Kartik
High Energy Physics - Theory
The correct gravitational representation of the supersymmetric index is a smooth complex solution, rather than the na\"ıve Euclidean continuation of the Lorentizan BPS black hole. We construct such saddles for black holes with \(\mathrm{AdS}_3\times S^3\) boundary conditions in the STU model. We arrive at the same finite-temperature BTZ \(\times S^3\) geometries in two independent ways: from two-center four-dimensional BPS solutions with complex dipole charges, and from six-dimensional black strings after imposing the BPS relation among conserved charges. We analyze the resulting smoothness and periodicity conditions and show that they are precisely those required for globally well-defined supersymmetry and for the thermodynamic potentials of the supersymmetric index.
title Complex BPS Black Holes in AdS$_3\times S^3$
topic High Energy Physics - Theory
url https://arxiv.org/abs/2605.28737