• Open Access

Revealing the interior of black holes out of equilibrium in the Sachdev-Ye-Kitaev model

Ram Brustein and Yoav Zigdon
Phys. Rev. D 98, 066013 – Published 24 September 2018

Abstract

The Sachdev-Ye-Kitaev (SYK) model can be used to describe black holes (BHs) in two-dimensional nearly anti–de Sitter gravity. We show that when such BHs are perturbed by a time-dependent negative-energy perturbation, their interior can be partially revealed. In the SYK model, a partial measurement of the state of the Majorana fermion pairs allows one to construct a matching time-dependent negative-energy perturbation of the BH geometry that shifts the state of the BH away from its equilibrium state. Kourkoulou and Maldacena showed that, if the perturbation is strong enough, the interior can be fully exposed and the BH disappears. Here, we show that when the perturbation is weaker than the threshold for full exposure, it effectively moves the horizon of the BH inwards, thus partially exposing the interior of the BH and leaving behind a smaller BH. The exposure is in proportion to the number of measured Majorana pairs and so also in proportion to the magnitude of the energy of the perturbation. From the boundary, the partial measurement is perceived as a burst of radiation whose strength and duration are proportional to the number of measured Majorana pairs.

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  • Received 28 April 2018

DOI:https://doi.org/10.1103/PhysRevD.98.066013

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & AstrophysicsQuantum Information, Science & TechnologyParticles & FieldsStatistical Physics & Thermodynamics

Authors & Affiliations

Ram Brustein* and Yoav Zigdon

  • Department of Physics, Ben-Gurion University, Beer-Sheva 84105, Israel

  • *ramyb@bgu.ac.il
  • yoavzig@post.bgu.ac.il

Article Text

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Issue

Vol. 98, Iss. 6 — 15 September 2018

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