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Near-Extremal Limits of Warped Black Holes

by Ankit Aggarwal, Alejandra Castro, Stéphane Detournay, Beatrix Mühlmann

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Submission summary

Authors (as registered SciPost users): Ankit Aggarwal · Alejandra Castro
Submission information
Preprint Link:  (pdf)
Date accepted: 2023-07-18
Date submitted: 2023-07-12 03:31
Submitted by: Aggarwal, Ankit
Submitted to: SciPost Physics
Ontological classification
Academic field: Physics
  • Gravitation, Cosmology and Astroparticle Physics
  • High-Energy Physics - Theory
Approach: Theoretical


A holographic description of three-dimensional warped black holes suffers from ambiguities due to a seemingly harmless choice of coordinate system. This gives rise to the notion of ensembles in warped black holes, and we focus on two of them: the canonical and quadratic ensemble. Our aim is to quantify the imprint of these ensembles in the near-extremal limit of a warped black hole. To this end, for each ensemble, we explore the thermodynamic response and evaluate greybody factors. We also set-up a holographic dictionary in their near-AdS$_2$ region, and decode aspects of the dual near-CFT$_1$. This gives us different perspectives of the black hole that we can contrast and compare. On the one hand, we find perfect agreement between the near-extremal limit of the canonical ensemble warped black holes, their near-AdS$_2$ effective analysis, and a warped conformal field theory description. On the other, we are led to rule out the quadratic ensemble due to inconsistencies at the quantum level with the near-AdS$_2$ effective description.

Author comments upon resubmission

We hope that with this resubmission we have incorporated the suggestions of referees.

List of changes

Based on the referee reports:
1. Minor typos corrected.
2. A reference suggested by the referee was added.
3. A footnote was incorporated in the main text.

Published as SciPost Phys. 15, 083 (2023)

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