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Critical islands

Krishnan, C (2021) Critical islands. In: Journal of High Energy Physics, 2021 (1).

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Official URL: https://doi.org/10.1007/JHEP01(2021)179


We discuss a doubly-holographic prescription for black holes in braneworlds with a vanishing cosmological constant. It involves calculating Ryu-Takayanagi surfaces in AdS black funnel spacetimes attached to braneworld black holes in the critical Randall- Sundrum II model. Critical braneworlds have the virtue of having massless gravitons. Our approach should be useful when the braneworld is a cosmological black hole interacting with deconfined, large-N matter. In higher dimensions, explicit funnel metrics will have to be constructed numerically — but based on the general structure of the geometry, we present a natural guess for where one might find the semi-classical island. In a 3-dimensional example where a toy analytic black funnel is known, we can check our guess by direct calculation. We argue that this resolves a version of the information paradox in these braneworld systems, by finding strong evidence for “cosmological islands”. Comoving Ryu-Takayanagi surfaces and associated UV cut-offs on the brane, play natural roles.

Item Type: Journal Article
Publication: Journal of High Energy Physics
Publisher: Springer Science and Business Media Deutschland GmbH
Additional Information: The copyright for this article belongs to the Authors.
Keywords: AdS-CFT Correspondence; Black Holes in String Theory
Department/Centre: Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited: 20 May 2023 05:29
Last Modified: 20 May 2023 05:29
URI: https://eprints.iisc.ac.in/id/eprint/81447

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