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- W3100694824 abstract "A bstract We introduce a simple quantum generalization of the spectrum of classical Lyapunov exponents. We apply it to the SYK and XXZ models, and study the Lyapunov growth and entropy production. Our numerical results suggest that a black hole is not just the fastest scrambler, but also the fastest entropy generator. We also study the statistical features of the quantum Lyapunov spectrum and find universal random matrix behavior, which resembles the recently-found universality in classical chaos. The random matrix behavior is lost when the system is deformed away from chaos, towards integrability or a many-body localized phase. We propose that quantum systems holographically dual to gravity satisfy this universality in a strong form. We further argue that the quantum Lyapunov spectrum contains important additional information beyond the largest Lyapunov exponent and hence provides us with a better characterization of chaos in quantum systems." @default.
- W3100694824 created "2020-11-23" @default.
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- W3100694824 date "2019-04-01" @default.
- W3100694824 modified "2023-10-15" @default.
- W3100694824 title "Quantum Lyapunov spectrum" @default.
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- W3100694824 doi "https://doi.org/10.1007/jhep04(2019)082" @default.
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