Quantum Entropy Thermalization
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Author(s)
Huang, Yichen
Harrow, Aram W.
Date Issued
May 21, 2025
Journal
Communications in Mathematical Physics
Publisher
Springer Berlin Heidelberg
Citation
Huang, Y., Harrow, A.W. Quantum Entropy Thermalization. Commun. Math. Phys. 406, 136 (2025).
Version
Author's final manuscript
Abstract
In an isolated quantum many-body system undergoing unitary evolution, the entropy of a subsystem (smaller than half the system size) thermalizes if at long times, it is to leading order equal to the thermodynamic entropy of the subsystem at the same energy. In this paper, we prove entropy thermalization for a nearly integrable Sachdev–Ye–Kitaev model initialized in a pure product state. The model is obtained by adding random all-to-all 4-body interactions as a perturbation to a random free-fermion model.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
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Creative Commons Attribution-Noncommercial-ShareAlike
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DOI of Published Version
https://doi.org/10.1007/s00220-025-05268-8
