Reversibility of dynamics and multiple-quantum coherences
A. K. Khitrin
TL;DR
This paper explores how the decay of the Loschmidt echo in spin systems relates to multiple-quantum coherences and extends the analysis of quantum reversibility to broader systems.
Contribution
It introduces a generalized framework connecting Loschmidt echo decay with quantum coherences and analyzes reversibility in various quantum systems.
Findings
Decay of Loschmidt echo linked to multiple-quantum coherences
Extended analysis to other quantum systems
Provides insights into quantum reversibility
Abstract
In spin systems, the decay of the Loschmidt echo in the time-reversal experiment (evolution, perturbation, time-reversed evolution) is linked to the generation of multiple-quantum coherences. The approach is extended to other systems, and the general problem of reversibility of quantum dynamics is analyzed.
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