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Page curve from non-Markovianity

Su, Kaixiang and Zhang, Pengfei and Zhai, Hui (2021) Page curve from non-Markovianity. Journal of High Energy Physics, 2021 (6). Art. No. 156. ISSN 1029-8479. doi:10.1007/jhep06(2021)156.

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In this paper, we use the exactly solvable Sachdev-Ye-Kitaev model to address the issue of entropy dynamics when an interacting quantum system is coupled to a non-Markovian environment. We find that at the initial stage, the entropy always increases linearly matching the Markovian result. When the system thermalizes with the environment at a sufficiently long time, if the environment temperature is low and the coupling between system and environment is weak, then the total thermal entropy is low and the entanglement between system and environment is also weak, which yields a small system entropy in the long-time steady state. This manifestation of non-Markovian effects of the environment forces the entropy to decrease in the later stage, which yields the Page curve for the entropy dynamics. We argue that this physical scenario revealed by the exact solution of the Sachdev-Ye-Kitaev model is universally applicable for general chaotic quantum many-body systems and can be verified experimentally in near future.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Zhang, Pengfei0000-0002-7408-0918
Zhai, Hui0000-0001-8118-6027
Additional Information:© 2021 The Authors. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited. Article funded by SCOAP3. Received: February 27, 2021; Revised: May 7, 2021; Accepted: June 13, 2021; Published: June 25, 2021. We thank Yiming Chen, Yingfei Gu, and Zhenbin Yang for helpful discussion. This work is supported by Beijing Outstanding Young Scientist Program, NSFC Grant No. 11734010, MOST under Grant No. 2016YFA0301600.
Group:Institute for Quantum Information and Matter, Walter Burke Institute for Theoretical Physics
Funding AgencyGrant Number
National Natural Science Foundation of China11734010
Ministry of Science and Technology (Taipei)2016YFA0301600
Subject Keywords:1/N Expansion, Field Theories in Lower Dimensions, AdS-CFT Correspondence
Issue or Number:6
Record Number:CaltechAUTHORS:20210701-144159635
Persistent URL:
Official Citation:Su, K., Zhang, P. & Zhai, H. Page curve from non-Markovianity. J. High Energ. Phys. 2021, 156 (2021).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109691
Deposited By: Tony Diaz
Deposited On:01 Jul 2021 17:28
Last Modified:06 Jul 2021 22:02

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