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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.

Published as SciPost Phys. 15, 083 (2023)

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.

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