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New insights on near-extremal black holes

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arxiv 2307.10423 v1 pith:7W7RARBA submitted 2023-07-19 hep-th gr-qc

New insights on near-extremal black holes

classification hep-th gr-qc
keywords blackholesnear-extremalanalysisexistextremalholemodified
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We describe two puzzles that arise from a semiclassical treatment of near-extremal black hole thermodynamics. Both puzzles are resolved by realizing that quantum corrections become arbitrarily large at low temperatures, and we explain how the spectrum and dynamics of near-extremal black holes are modified. This analysis also implies that without low energy supersymmetry, such as in the real world, extremal black holes at exactly zero temperature do not exist since the classical picture breaks down completely. In the context of supergravity the analysis is modified; supersymmetric extremal black holes do exist and they are separated from the non-extremal spectrum by a gap power-law suppressed in the entropy. This justifies black hole microstate counting performed in the 90's using string theory.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Quantum corrections to the near-extremal thermodynamics of (warped) BTZ black holes

    hep-th 2026-07 conditional novelty 6.5

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    hep-th 2026-04 unverdicted novelty 6.0

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  3. Universal Lichnerowicz Lifting of Near-Horizon Soft Modes

    hep-th 2026-06 unverdicted novelty 5.0

    The universal logarithmic temperature dependence in near-extremal black hole thermodynamics originates from the first-order lifting of Lichnerowicz tensor zero modes in a 2D maximally symmetric throat, which after nor...

  4. Revisiting near-extremal and near-BPS black holes in AdS3 supergravity

    hep-th 2026-04 unverdicted novelty 5.0

    Quantum analysis of AdS3 supergravity path integrals at low temperature shows near-horizon region inequivalent to BTZ and sharpens near-extremal versus near-BPS distinctions.

  5. Limits on the Statistical Description of Charged de Sitter Black Holes

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    Adopting the Bousso-Hawking observer normalization for RNdS black holes produces finite heat capacity near the Nariai limit while confirming vanishing capacity in cold and ultracold limits, limiting statistical descriptions.

  6. Some universalities in the partition functions of low-dimensional gravity models

    hep-th 2026-05 unverdicted novelty 2.0

    Conjectures universalities in partition functions across low-dimensional gravity models by examining similarities under parameter changes, wavefunction behaviors, entanglement, and wormhole connections.