Characterization of quantum chaos by two-point correlation functions
Journal Article
·
· Physical Review. E
- California Institute of Technology (CalTech), Pasadena, CA (United States); Stanford Univ., CA (United States); OSTI
- Univ. of Surrey, Guildford (United Kingdom); Univ. of Southampton (United Kingdom); Brown Univ., Providence, RI (United States)
- Univ. of Maryland, College Park, MD (United States)
- Kyoto Univ. (Japan)
In this work, we propose a characterization of quantum many-body chaos: given a collection of simple operators, the set of all possible pair correlations between these operators can be organized into a matrix with a random-matrix-like spectrum. This approach is particularly useful for locally interacting systems, which do not generically show exponential Lyapunov growth of out-of-time-ordered correlators. We demonstrate the validity of this characterization by numerically studying the Sachdev-Ye-Kitaev model and a one-dimensional spin chain with random magnetic field (XXZ model).
- Research Organization:
- Univ. of Colorado, Boulder, CO (United States)
- Sponsoring Organization:
- Japan Society for the Promotion of Science (JSPS); National Science Foundation (NSF); Science and Technology Facilities Council (STFC); Simons Foundation; USDOE Office of Science (SC)
- Grant/Contract Number:
- SC0017905
- OSTI ID:
- 1803190
- Journal Information:
- Physical Review. E, Journal Name: Physical Review. E Journal Issue: 2 Vol. 102; ISSN 2470-0045
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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