Semiclassical theory of out-of-time-order correlators for low-dimensional classically chaotic systems

Aug 13, 2018
12 pages
Published in:
  • Phys.Rev.E 98 (2018) 6, 062218
  • Published: Dec 22, 2018
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Abstract: (APS)
The out-of-time-order correlator (OTOC), recently analyzed in several physical contexts, is studied for low-dimensional chaotic systems through semiclassical expansions and numerical simulations. The semiclassical expansion for the OTOC yields a leading-order contribution in ℏ2 that is exponentially increasing with time within an intermediate, temperature-dependent, time window. The growth-rate in such a regime is governed by the Lyapunov exponent of the underlying classical system and scales with the square-root of the temperature.
Note:
  • 24 pages (one column), 7 figures. Some changes and corrections added. Closest to published version
  • Nonlinear Dynamics and Chaos