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Jackiw-Teitelboim Gravity from the Karch-Randall Braneworld

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arxiv 2206.04695 v1 pith:MBNSKCJI submitted 2022-06-09 hep-th gr-qchep-ph

Jackiw-Teitelboim Gravity from the Karch-Randall Braneworld

classification hep-th gr-qchep-ph
keywords gravitybraneworldclassicaldilatonentanglementjackiw-teitelboimkarch-randallradion
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In this letter, we show that Jackiw-Teitelboim (JT) gravity can be naturally realized in the Karch-Randall braneworld. Notably the role of the dilaton in JT gravity is played by the radion in a suitably orbifolded version of the setup. In the classical entanglement entropy calculation, there is an apparent degeneracy of Ryu-Takayanagi surfaces. We demonstrate how quantum fluctuations of the radion/dilaton resolves this would-be classical puzzle regarding entanglement wedge reconstruction.

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Cited by 3 Pith papers

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

  1. Massless Islands in Wedge Holography

    hep-th 2026-05 unverdicted novelty 7.0

    A unitary defect CFT at the wedge corner supplies an auxiliary holographic entropy term that balances area variations and enables stable non-horizon islands in massless ghost-free wedge holography.

  2. Pure states for subregions in gravity and their entanglement entropy

    hep-th 2026-06 unverdicted novelty 6.0

    A construction assigns pure states to subregions in quantum gravity via partially frozen path integrals and gives a holographic prescription for their entanglement entropy that satisfies consistency conditions and rec...

  3. Large-c BCFT Entanglement Entropy with Deformed Boundaries from Emergent JT Gravity

    hep-th 2026-04 unverdicted novelty 6.0

    At large central charge, BCFT von Neumann entropy with deformed boundaries is reproduced by island entropy in an emergent JT gravity setup with transparent boundary conditions set by the deformation.