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Information Scrambling and Loschmidt Echo

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arxiv 1903.02651 v4 pith:PJ7B5MFE submitted 2019-03-06 quant-ph

Information Scrambling and Loschmidt Echo

classification quant-ph
keywords echoloschmidtchaoticcorrelatorinformationscramblingaccessibleanalytically
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We demonstrate analytically and verify numerically that the out-of-time order correlator is given by the thermal average of Loschmidt echo signals. This provides a direct link between the out-of-time-order correlator -- a recently suggested measure of information scrambling in quantum chaotic systems -- and the Loschmidt echo, a well-appreciated familiar diagnostic that captures the dynamical aspect of chaotic behavior in the time domain, and is accessible to experimental studies.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Extracting conformal data from Loschmidt echoes after critical quenches

    quant-ph 2026-07 conditional novelty 6.0

    Boundary-CFT scaling dimensions and central charge can be reconstructed from the system-size dependence and phase of Loschmidt echoes after a critical quench, bypassing ground-state preparation.