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Holographic Derivation of Entanglement Entropy from AdS/CFT

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abstract

A holographic derivation of the entanglement entropy in quantum (conformal) field theories is proposed from AdS/CFT correspondence. We argue that the entanglement entropy in d+1 dimensional conformal field theories can be obtained from the area of d dimensional minimal surfaces in AdS_{d+2}, analogous to the Bekenstein-Hawking formula for black hole entropy. We show that our proposal perfectly reproduces the correct entanglement entropy in 2D CFT when applied to AdS_3. We also compare the entropy computed in AdS_5 \times S^5 with that of the free N=4 super Yang-Mills.

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Replica wormholes and the black hole interior

hep-th · 2019-11-27 · conditional · novelty 9.0

Replica wormhole geometries justify the replica trick computation of the Page curve in holographic black hole models and support entanglement wedge reconstruction via the Petz map.

Replica Wormholes and the Entropy of Hawking Radiation

hep-th · 2019-11-27 · accept · novelty 8.0

Replica wormholes in the gravitational path integral yield the island rule for the fine-grained entropy of Hawking radiation, ensuring it follows the unitary Page curve in two-dimensional dilaton gravity.

The Page curve of Hawking radiation from semiclassical geometry

hep-th · 2019-08-29 · accept · novelty 8.0

Hawking radiation entropy follows the Page curve when quantum extremal surfaces are identified with RT/HRT surfaces in a higher-dimensional holographic dual, making the black hole interior part of the radiation's entanglement wedge.

Massless Islands in Wedge Holography

hep-th · 2026-05-30 · 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.

dS$^4$ Metamorphosis

hep-th · 2026-02-23 · conditional · novelty 7.0

Higher spin gravity path integral on S^4 glues to an Sp(N) or superconformal S^3 boundary theory, giving leading contribution 2^N with one-loop cancellations.

Krylov Subspace Dynamics as Near-Horizon AdS$_2$ Holography

hep-th · 2026-02-12 · unverdicted · novelty 7.0

In the continuum limit the discrete Krylov chain becomes a Klein-Gordon field in AdS2, with Lanczos growth rate α identified as πT, recovering the maximal chaos bound and requiring the Breitenlohner-Freedman bound for consistency.

Precision tests of bulk entanglement: $AdS_3$ vectors

hep-th · 2025-11-17 · unverdicted · novelty 7.0

Bulk single-particle states of a massive Chern-Simons vector in AdS3 produce entanglement entropy corrections that match the CFT replica-trick result for the corresponding primary and descendants at leading and sub-leading orders, with vanishing edge-mode contribution.

Symmetry-Resolved Entanglement Entropy from Heat Kernels

hep-th · 2025-11-03 · unverdicted · novelty 7.0

An improved heat kernel framework with phase-factor reconstruction computes symmetry-resolved entanglement entropy for charged systems and derives a cMERA flow equation that agrees with CFT and holographic calculations.

Subregion Complementarity in AdS/CFT

hep-th · 2023-09-08 · unverdicted · novelty 7.0

Subregion duality fails in AdS/CFT at leading large N, leading to the proposal of subregion complementarity allowing different CFT operators to describe one bulk subregion.

Hofstadter's Butterfly in AdS$_3$ Black Holes

hep-th · 2026-04-15 · unverdicted · novelty 7.0

A single-band lattice model on the BTZ cylinder produces a curvature-dependent Harper equation whose spectra show sharpened butterfly fragmentation at weak curvature and suppressed magnetic response near larger horizons.

Exact Bulk-Boundary Pairs in AdS/CFT

hep-th · 2026-05-15 · unverdicted · novelty 6.0

Exact pairing of CFT two-point functions with interior AdS geodesics on open solid torus via conformal kinematics, without semiclassical approximations.

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hep-th · 2025-12-22 · unverdicted · novelty 6.0

Holographic tensor networks constructed from PEE-thread tessellations of AdS geometry reproduce the exact Ryu-Takayanagi formula in factorized EPR, perfect-tensor, and random variants.

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hep-th · 2025-12-12 · unverdicted · novelty 6.0

Modular Witten diagrams reproduce the O(λ² G_N) correction to holographic entanglement entropy, matching the canonical energy term in the quantum Ryu-Takayanagi formula with wedge shape deformation.

(Iso)spin from Isospin in Top-Down Holography

hep-th · 2025-12-01 · unverdicted · novelty 6.0 · 2 refs

In top-down holographic models, monopole-induced diagonal symmetry causes dilaton fluctuations to mix SU(2) gauge and SO(3) isometry angular momenta, reproducing the Jackiw-Rebbi-Hasenfratz-'t Hooft spin-from-isospin mechanism.

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