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Islands in Schwarzschild black holes

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arxiv 2004.05863 v2 pith:5Q5RM24L submitted 2020-04-13 hep-th gr-qc

Islands in Schwarzschild black holes

Koji Hashimoto , Norihiro Iizuka , Yoshinori Matsuo This is my paper
classification hep-th gr-qc
keywords blackentropypagetimeentanglementeternalholeholes
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the Page curve for asymptotically flat eternal Schwarzschild black holes in four and higher spacetime dimensions. Before the Page time, the entanglement entropy grows linearly in time. After the Page time, the entanglement entropy of a given region outside the black hole is largely modified by the emergence of an island, which extends to the outer vicinity of the event horizon. As a result, it remains a constant value which reproduces the Bekenstein-Hawking entropy, consistent with the finiteness of the von Neumann entropy for an eternal black hole.

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Cited by 3 Pith papers

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  1. 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.

  2. The Remnant of an Evaporating Rotating Regular Black Hole from the Generalized Entropy in the Final Stage of Evaporation

    hep-th 2026-07 conditional novelty 5.0

    A rotating regular black hole leaves a remnant because the correction term in the generalized entropy of Hawking radiation vanishes at a finite mass above the extremal limit.

  3. Thermodynamics and information recovery of Schwarzschild AdS black holes in conformal Killing gravity

    gr-qc 2026-03 unverdicted novelty 5.0

    In conformal Killing gravity, Schwarzschild AdS black holes obey the Bekenstein-Hawking area law, exhibit parameter-dependent Van der Waals-like phase transitions for positive values, and recover information via islan...