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BCFT and Islands in Two Dimensions

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arxiv 2202.08462 v1 pith:PNQNRT3A submitted 2022-02-17 hep-th gr-qc

BCFT and Islands in Two Dimensions

Kenta Suzuki , Tadashi Takayanagi This is my paper
classification hep-th gr-qc
keywords bcftboundarygravitationalgravityrelationsystemtwo-dimensionalbrane
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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By combining the AdS/BCFT correspondence and the brane world holography, we expect an equivalence relation between a boundary conformal field theory (BCFT) and a gravitational system coupled to a CFT. However, it still remains unclear how the boundary condition of the BCFT is translated in the gravitational system. We examine this duality relation in a two-dimensional setup by looking at the computation of entanglement entropy and energy flux conservation. We also identify the two-dimensional gravity which is dual to the boundary dynamics of a BCFT. Moreover, we show that by considering a gravity solution with scalar fields turned on, we can reproduce one point functions correctly in the AdS/BCFT.

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Cited by 4 Pith papers

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

  1. A Tale of Two Hartle-Hawking Wave Functions: Fully Gravitational vs Partially Frozen

    hep-th 2026-05 unverdicted novelty 7.0

    In AdS the fully gravitational Hartle-Hawking wave function acquires a nontrivial one-loop phase while the partially frozen version stays real and positive; a partially frozen de Sitter sphere shows phase cancellation.

  2. Entanglement islands, fuzzballs and stretched horizons

    hep-th 2026-05 unverdicted novelty 6.0

    Fuzzball models with stretched horizons modify or eliminate entanglement islands depending on boundary conditions and cap geometry, producing information paradox analogues in some cases.

  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.

  4. Defects extremal surfaces and interface CFTs

    hep-th 2026-07 conditional novelty 4.0

    A generalized defect-extremal-surface prescription for AdS3/ICFT2 is shown to match island-formula entropies in the large-tension limit and to produce Page curves for 2d eternal black holes.