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Disconnecting a traversable wormhole: Universal quench dynamics in random spin models

Zhou, Tian-Gang and Pan, Lei and Chen, Yu and Zhang, Pengfei and Zhai, Hui (2021) Disconnecting a traversable wormhole: Universal quench dynamics in random spin models. Physical Review Research, 3 (2). Art. No. L022024. ISSN 2643-1564. doi:10.1103/physrevresearch.3.l022024.

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Understanding strongly interacting quantum matter and quantum gravity are both important open issues in theoretical physics, and the holographic duality between quantum field theory and gravity theory nicely brings these two topics together. Nevertheless, direct connections between gravity physics and experimental observations in quantum matter are still rare. Here we utilize the gravity physics picture to understand quench dynamics experimentally observed in a class of random spin models realized in several different quantum systems, where the dynamics of magnetization are measured after the external polarization field is suddenly turned off. Two universal features of the magnetization dynamics, namely, a slow decay described by a stretched exponential function and an oscillatory behavior, are respectively found in different parameter regimes across different systems. This paper addresses the issues of generic conditions under which these two universal features can occur, and we find that a natural answer to this question emerges in the gravity picture. By the holographic duality bridged by a model proposed by Maldacena and Qi, the quench dynamics after suddenly turning off the external polarization field is mapped to disconnecting an eternal traversable wormhole. Our studies show that insight from gravity physics can help unifying different experiments in quantum systems.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Zhou, Tian-Gang0000-0002-4815-2578
Zhang, Pengfei0000-0002-7408-0918
Zhai, Hui0000-0001-8118-6027
Additional Information:© 2021 The Author(s). 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. (Received 1 December 2020; accepted 7 June 2021; published 21 June 2021) We thank Yiming Chen, Bartek Czech, Ruihua Fan, Yingfei Gu, Chao-Ming Jian, Xinhua Peng, Xiao-Liang Qi and Yi-Zhuang You for helpful discussions. This work is supported by Beijing Outstanding Young Scientist Program (H.Z.), NSFC Grant No. 11734010 (H.Z. and Y.C.), NSFC under Grant No. 11604225 (Y.C.), MOST under Grant No. 2016YFA0301600 (H.Z.) and Beijing Natural Science Foundation (Grant No. Z180013) (Y.C.).
Group:Institute for Quantum Information and Matter, Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
National Natural Science Foundation of China11734010
National Natural Science Foundation of China11604225
Ministry of Science and Technology (China)2016YFA0301600
Natural Science Foundation of Beijing MunicipalityZ180013
Issue or Number:2
Record Number:CaltechAUTHORS:20210626-225301379
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109617
Deposited By: George Porter
Deposited On:28 Jun 2021 22:38
Last Modified:16 Nov 2021 19:37

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