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Condensed Matter > Statistical Mechanics

Title: Proposal for many-body quantum chaos detection

Abstract: In this work, we use the term ``quantum chaos'' to refer to spectral correlations similar to those found in random matrix theory. Quantum chaos can be diagnosed through the analysis of level statistics using the spectral form factor, which detects both short- and long-range level correlations. The spectral form factor corresponds to the Fourier transform of the two-point spectral correlation function and exhibits a typical slope-dip-ramp-plateau structure (aka correlation hole) when the system is chaotic. We discuss how this structure could be detected through the dynamics of two physical quantities accessible to experimental many-body quantum systems: the survival probability and the spin autocorrelation function. When the system is small, the dip reaches values that are large enough at times which are short enough to be detected with current experimental platforms and commercially available quantum computers.
Comments: 8.5 pages, 5 figures
Subjects: Statistical Mechanics (cond-mat.stat-mech); Quantum Physics (quant-ph)
Cite as: arXiv:2401.01401 [cond-mat.stat-mech]
  (or arXiv:2401.01401v2 [cond-mat.stat-mech] for this version)

Submission history

From: Adway Das [view email]
[v1] Tue, 2 Jan 2024 19:00:00 GMT (1817kb,D)
[v2] Mon, 15 Jan 2024 23:12:22 GMT (1817kb,D)

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