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BCFT in a Black Hole Background: An Analytical Holographic Model

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arxiv 2209.02074 v1 pith:ZMXIKFKZ submitted 2022-09-05 hep-th

BCFT in a Black Hole Background: An Analytical Holographic Model

classification hep-th
keywords entanglementanalyticalbackgroundblackfieldphasetheorybcft
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the entanglement phase structure of a holographic boundary conformal field theory (BCFT) in a two-dimensional black hole background. The bulk dual is the AdS$_3$ black string geometry with a Karch-Randall brane. We compute the subregion entanglement entropy of various two-sided bipartitions to elucidate the phase space where a Page curve exists in this setup. We do fully analytical computations on both the gravity side and the field theory side and demonstrate that the results precisely match. We discuss the entanglement phase structure describing where a Page curve exists in this geometry in the context of these analytical results. This is a useful model to study entanglement entropy for quantum field theory on a curved background.

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Cited by 5 Pith papers

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

  1. Dynamical Entanglement Phase Transitions in Holographic CFTs

    hep-th 2026-05 unverdicted novelty 7.0

    In large-central-charge holographic CFTs, post-quench mutual information organizes into six phases governed by conformal block dominance and D4 symmetry breaking to Z2 x Z2.

  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. Quasinormal modes of the thick braneworld in $f(T)$ gravity

    gr-qc 2026-04 unverdicted novelty 5.0

    In a thick braneworld model with f(T) = T + α T², the parameter α induces brane splitting and alters the decay rates of quasinormal modes, with two numerical methods agreeing on the low-overtone spectrum.

  4. Two-scalar-field $f(R)$ Thick Branes, Gravitational Resonances and Quasinormal Modes

    hep-th 2026-06 unverdicted novelty 4.0

    In ghost-free two-scalar f(R) thick branes, internal structure produces no narrow real-axis tensor resonances; quasinormal modes are broad with quality factors 0.9-1.9.

  5. Building an AdS/BCFT Josephson junction within Horndeski gravity

    hep-th 2025-10 reject novelty 4.0

    AdS/BCFT with Horndeski gravity is claimed to yield Josephson junctions whose phase and current depend on the Horndeski couplings, but the condensate and critical temperature are put in by hand.