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Microscopic origin of the entropy of astrophysical black holes

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arxiv 2212.08623 v3 pith:MUXQLR2G submitted 2022-12-16 hep-th gr-qc

Vijay Balasubramanian , Albion Lawrence , Javier M. Magan , Martin Sasieta This is my paper
classification hep-thgr-qc
keywords blackentropyholesmicrostatesoriginoverlapsareaastrophysical
verification ladder T0 review T1 audit T2 compute T3 formal
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We construct an infinite family of microstates for black holes in Minkowski spacetime which have effective semiclassical descriptions in terms of collapsing dust shells in the black hole interior. Quantum mechanical wormholes cause these states to have exponentially small, but universal, overlaps. We show that these overlaps imply that the microstates span a Hilbert space of log dimension equal to the event horizon area divided by four times the Newton constant, explaining the statistical origin of the Bekenstein-Hawking entropy.

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Cited by 8 Pith papers

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

  1. A Holographic Map from AdS$_3$ to CFT$_2$

    hep-th 2026-07 conditional novelty 6.0 of 10

    Semiclassical pure AdS3 gravity states, labelled by fixed-area geodesic networks, are mapped to CFT2 primary states whose wavefunctions are networks of OPE coefficients.

  2. Baby Universes from Thermal Pure States in SYK

    hep-th 2025-11 conditional novelty 6.0 of 10

    A JT-gravity baby universe is constructed with a microscopic dual given by a low-temperature thermal pure state of two coupled SYK models, and its bulk entanglement to the AdS region is O(N) below the phase transition.

  3. Microstate counting from defects in de Sitter

    hep-th 2025-11 conditional novelty 6.0 of 10

    Counting defect microstates via Lorentzian wormholes reproduces the de Sitter and Schwarzschild-de Sitter entropy area laws.

  4. Flow-geometry microstates

    hep-th 2025-10 conditional novelty 6.0 of 10

    Particle-insertion microstates in AdS2→dS2 flow geometries are counted via wormhole path integrals, giving a Hilbert-space dimension e^{2S_Flow} that matches Gibbons-Hawking; the purely-de Sitter spanning claim depend...

  5. How to Count States in Gravity

    hep-th 2025-06 conditional novelty 6.0 of 10

    The Gibbons-Hawking Euclidean gravity path integral with periodic time equals an explicit thermal trace over the single-boundary quantum gravity Hilbert space.

  6. Non-conformal Line Defect (Shell Operator) in AdS$_3$/CFT$_2$: Spinning and Higher Point Correlators

    hep-th 2025-06 conditional novelty 6.0 of 10

    Spinning and higher-point thin-shell operator correlators in AdS3/CFT2 are shown to match across ETH analysis, the vacuum Virasoro block, and gravitational on-shell actions, with order-dependent structure for multiple...

  7. The Baby Universe is Fine and the CFT Knows It: On Holography for Closed Universes

    hep-th 2025-07 conditional novelty 5.0 of 10

    A closed universe in AdS/CFT is not ruled out by recent SWAP-test arguments; the one-dimensional Hilbert space seen from the CFT is external indistinguishability, and CFT data can reconstruct the closed universe's geometry.

  8. Complementarity of Gravitational Collapse (I) Origin of the Bekenstein-Hawking Entropy

    gr-qc 2025-05 reject novelty 4.0 of 10

    The paper claims black hole entropy arises from counting quantum states of collapsing dust shells, with Schwarzschild and Lemaitre coordinates giving complementary views of the same horizonless interior.

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