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The path integral of 3D gravity near extremality; or, JT gravity with defects as a matrix integral

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arxiv 2006.11317 v2 pith:KKLRX5P5 submitted 2020-06-19 hep-th gr-qc

classification hep-thgr-qc
keywords gravityintegraltheorydefectsextremalitymatrixnearpath
verification ladder T0 review T1 audit T2 compute T3 formal
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We propose that a class of new topologies, for which there is no classical solution, should be included in the path integral of three-dimensional pure gravity, and that their inclusion solves pathological negativities in the spectrum, replacing them with a nonperturbative shift of the BTZ extremality bound. We argue that a two-dimensional calculation using a dimensionally reduced theory captures the leading effects in the near extremal limit. To make this argument, we study a closely related two-dimensional theory of Jackiw-Teitelboim gravity with dynamical defects. We show that this theory is equivalent to a matrix integral.

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Forward citations

Cited by 8 Pith papers

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

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    The entropy of a bulk region in holographic states equals the generalized entropy of the smallest wedge containing it, derived from a replica path integral via a hollow-graphic construction.

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    Ultracold Reissner-Nordström de Sitter black hole fluctuations are proposed to be described by a gauged near-flat dilaton gravity model with a Gaussian spectral density, yielding a finite partition function and dynami...

  3. Black Holes and Random Variables

    hep-th 2026-07 unverdicted novelty 6.0 of 10

    High-energy CFT and black-hole interval counts are conjectured to obey the FHK extreme-value law; the resulting O(1) erratic fluctuations limit semiclassical AdS precision to e^{-S0}.

  4. The many facets of a hyperbolic tetrahedron: open and closed triangulations of 3d gravity

    hep-th 2026-04 unverdicted novelty 6.0 of 10

    Open Virasoro TQFT equals fixed-length/angle 3d gravity path integrals on compact regions and yields the CTV–scalar Virasoro relation via open-closed duality.

  5. Resolving Black Hole Singularities in Jackiw-Teitelboim Gravity

    hep-th 2026-02 conditional novelty 6.0 of 10

    In JT gravity, the left confining potential required by spectral discreteness makes the wormhole length turn around and plateau, allowing boundary time to run past the would-be singularity and eliminating future horizons.

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    hep-th 2025-08 conditional novelty 6.0 of 10

    Fragmentation of knots and links by Wilson lines builds wormhole amplitudes that give non-perturbative Gaussian and non-Gaussian corrections to OPE statistics in 3d gravity and CFT2.

  7. Triangulating quantum gravity in AdS$_3$

    hep-th 2025-07 conditional novelty 6.0 of 10

    The fixed-angle gravitational path integral in AdS3 equals a Conformal Turaev-Viro partition function, the fixed-length path integral equals a Virasoro TQFT amplitude squared, and the semiclassical geometries are buil...

  8. JT gravity and deformed CFTs

    hep-th 2025-07 conditional novelty 5.0 of 10

    Deformed CFTs on a strip with a stretched-horizon conformal boundary are proposed as UV completions of pure and matter-coupled JT gravity, reproducing its entropy and a Page-curve-like saturation.

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