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Defect extremal surface as the holographic counterpart of Island formula

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arxiv 2012.07612 v1 pith:YVINUOGZ submitted 2020-12-14 hep-th cond-mat.str-elgr-qcquant-ph

classification hep-thcond-mat.str-elgr-qcquant-ph
keywords surfacedefectextremalformulaquantumboundarybranecounterpart
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We propose defect extremal surface as the holographic counterpart of boundary quantum extremal surface. The defect extremal surface is defined by minimizing the Ryu-Takayanagi surface corrected by the defect theory. This is particularly interesting when the RT surface crosses or terminates on the defect. In a simple set up of AdS/BCFT, we find that the defect extremal surface formula gives precisely the same results of the boundary quantum extremal surface. We provide a decomposition procedure of an AdS bulk with a defect brane to see clearly how Island formula emerges from a brane world system with gravity glued to a flat space quantum field theory.

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Cited by 2 Pith papers

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

  1. Bridging Boundaries: $T\bar{T}$, Double Holography, and Reflected Entropy

    hep-th 2024-11 conditional novelty 5.0 of 10

    Reflected entropy in T-bar-T-deformed AdS3/BCFT2 computed via island and defect extremal surface prescriptions agrees at leading order in the cutoff, and its Page curves show a discontinuity at the Page time.

  2. Defects extremal surfaces and interface CFTs

    hep-th 2026-07 conditional novelty 4.0 of 10

    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.

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