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Title: Black hole microstate cosmology

Abstract

In this note, we explore the possibility that certain high-energy holographic CFT states correspond to black hole microstates with a geometrical behind-the-horizon region, modelled by a portion of a second asymptotic region terminating at an end-of-the-world (ETW) brane. We study the time-dependent physics of this behind-the-horizon region, whose ETW boundary geometry takes the form of a closed FRW spacetime. We show that in many cases, this behind-the-horizon physics can be probed directly by looking at the time dependence of entanglement entropy for sufficiently large spatial CFT subsystems. We study in particular states defined via Euclidean evolution from conformal boundary states and give specific predictions for the behavior of the entanglement entropy in this case. We perform analogous calculations for the SYK model and find qualitative agreement with our expectations. We also calculate holographic complexity for the d = 2 ETW geometries, finding that complexity-action and complexity-volume proposals give the same linear growth at late times, but differ at early times. A fascinating possibility is that for certain states, we might have gravity localized to the ETW brane as in the Randall-Sundrum II scenario for cosmology. In this case, the effective description of physics beyond the horizon could be a bigmore » bang/big crunch cosmology of the same dimensionality as the CFT. In this case, the d-dimensional CFT describing the black hole microstate would give a precise, microscopic description of the d-dimensional cosmological physics.« less

Authors:
 [1];  [1];  [2];  [1];  [1];  [1]
  1. Univ. of British Columbia, Vancouver, BC (Canada)
  2. Univ. of Maryland, College Park, MD (United States)
Publication Date:
Research Org.:
Univ. of California, Oakland, CA (United States)
Sponsoring Org.:
Simons Foundation; USDOE Office of Science (SC), High Energy Physics (HEP); Natural Sciences and Engineering Research Council of Canada (NSERC)
OSTI Identifier:
1613202
Grant/Contract Number:  
SC0019380
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2019; Journal Issue: 7; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Physics; AdS-CFT Correspondence; Black Holes in String Theory; Conformal Field Theory; Holography and condensed matter physics (AdS/CMT)

Citation Formats

Cooper, Sean, Rozali, Moshe, Swingle, Brian, Van Raamsdonk, Mark, Waddell, Christopher, and Wakeham, David. Black hole microstate cosmology. United States: N. p., 2019. Web. https://doi.org/10.1007/jhep07(2019)065.
Cooper, Sean, Rozali, Moshe, Swingle, Brian, Van Raamsdonk, Mark, Waddell, Christopher, & Wakeham, David. Black hole microstate cosmology. United States. https://doi.org/10.1007/jhep07(2019)065
Cooper, Sean, Rozali, Moshe, Swingle, Brian, Van Raamsdonk, Mark, Waddell, Christopher, and Wakeham, David. Sat . "Black hole microstate cosmology". United States. https://doi.org/10.1007/jhep07(2019)065. https://www.osti.gov/servlets/purl/1613202.
@article{osti_1613202,
title = {Black hole microstate cosmology},
author = {Cooper, Sean and Rozali, Moshe and Swingle, Brian and Van Raamsdonk, Mark and Waddell, Christopher and Wakeham, David},
abstractNote = {In this note, we explore the possibility that certain high-energy holographic CFT states correspond to black hole microstates with a geometrical behind-the-horizon region, modelled by a portion of a second asymptotic region terminating at an end-of-the-world (ETW) brane. We study the time-dependent physics of this behind-the-horizon region, whose ETW boundary geometry takes the form of a closed FRW spacetime. We show that in many cases, this behind-the-horizon physics can be probed directly by looking at the time dependence of entanglement entropy for sufficiently large spatial CFT subsystems. We study in particular states defined via Euclidean evolution from conformal boundary states and give specific predictions for the behavior of the entanglement entropy in this case. We perform analogous calculations for the SYK model and find qualitative agreement with our expectations. We also calculate holographic complexity for the d = 2 ETW geometries, finding that complexity-action and complexity-volume proposals give the same linear growth at late times, but differ at early times. A fascinating possibility is that for certain states, we might have gravity localized to the ETW brane as in the Randall-Sundrum II scenario for cosmology. In this case, the effective description of physics beyond the horizon could be a big bang/big crunch cosmology of the same dimensionality as the CFT. In this case, the d-dimensional CFT describing the black hole microstate would give a precise, microscopic description of the d-dimensional cosmological physics.},
doi = {10.1007/jhep07(2019)065},
journal = {Journal of High Energy Physics (Online)},
number = 7,
volume = 2019,
place = {United States},
year = {2019},
month = {7}
}

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Cited by: 18 works
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