Operational islands and black hole dissipation in JT gravity

Abstract In this work, we revisit the problem of finding entanglement islands in 2d Jackiw-Teitelboim (JT) gravity. We implement the following adjustments to the traditional setup: (1) we do not explicitly couple to a non-gravitating system, instead we implement only pure absorption into a fiducial...

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Main Authors: Julian De Vuyst, Thomas G. Mertens
Format: Article
Language:English
Published: SpringerOpen 2023-01-01
Series:Journal of High Energy Physics
Subjects:
Online Access:https://doi.org/10.1007/JHEP01(2023)027
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author Julian De Vuyst
Thomas G. Mertens
author_facet Julian De Vuyst
Thomas G. Mertens
author_sort Julian De Vuyst
collection DOAJ
description Abstract In this work, we revisit the problem of finding entanglement islands in 2d Jackiw-Teitelboim (JT) gravity. We implement the following adjustments to the traditional setup: (1) we do not explicitly couple to a non-gravitating system, instead we implement only pure absorption into a fiducial detector, (2) we utilise the operationally defined renormalised matter entanglement entropy, as defined by the boundary observer’s wordline. We show that this leads to a unitary Page curve that we explicitly compute, with an island outside of the event horizon. Next, we extend the analysis to a charged and/or supersymmetric black hole. We find that in a certain regime the charged black hole grows first as it emits superradiation before eventually dissipating. We obtain similar results when embedding the system in a supersymmetric setting.
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spelling doaj.art-e538e3d22e2a46f29451c8c1edec574f2023-04-30T11:05:29ZengSpringerOpenJournal of High Energy Physics1029-84792023-01-012023115810.1007/JHEP01(2023)027Operational islands and black hole dissipation in JT gravityJulian De Vuyst0Thomas G. Mertens1Department of Physics & Astronomy, Ghent UniversityDepartment of Physics & Astronomy, Ghent UniversityAbstract In this work, we revisit the problem of finding entanglement islands in 2d Jackiw-Teitelboim (JT) gravity. We implement the following adjustments to the traditional setup: (1) we do not explicitly couple to a non-gravitating system, instead we implement only pure absorption into a fiducial detector, (2) we utilise the operationally defined renormalised matter entanglement entropy, as defined by the boundary observer’s wordline. We show that this leads to a unitary Page curve that we explicitly compute, with an island outside of the event horizon. Next, we extend the analysis to a charged and/or supersymmetric black hole. We find that in a certain regime the charged black hole grows first as it emits superradiation before eventually dissipating. We obtain similar results when embedding the system in a supersymmetric setting.https://doi.org/10.1007/JHEP01(2023)0272D GravityBlack HolesModels of Quantum GravityField Theories in Lower Dimensions
spellingShingle Julian De Vuyst
Thomas G. Mertens
Operational islands and black hole dissipation in JT gravity
Journal of High Energy Physics
2D Gravity
Black Holes
Models of Quantum Gravity
Field Theories in Lower Dimensions
title Operational islands and black hole dissipation in JT gravity
title_full Operational islands and black hole dissipation in JT gravity
title_fullStr Operational islands and black hole dissipation in JT gravity
title_full_unstemmed Operational islands and black hole dissipation in JT gravity
title_short Operational islands and black hole dissipation in JT gravity
title_sort operational islands and black hole dissipation in jt gravity
topic 2D Gravity
Black Holes
Models of Quantum Gravity
Field Theories in Lower Dimensions
url https://doi.org/10.1007/JHEP01(2023)027
work_keys_str_mv AT juliandevuyst operationalislandsandblackholedissipationinjtgravity
AT thomasgmertens operationalislandsandblackholedissipationinjtgravity