Universal non-Markovianity Detection in Hybrid Open Quantum Systems

TL;DR

This paper introduces a universal method to detect non-Markovian behavior in hybrid open quantum systems using the negativity volume of the generalized Wigner function, applicable to various system types.

Contribution

It proposes a novel, universal measure for non-Markovianity based on the negativity volume of the generalized Wigner function, applicable to diverse quantum systems.

Findings

The measure detects non-Markovianity in hybrid quantum systems.

Applicable to systems with discrete and continuous variables.

Demonstrated effectiveness through illustrative examples.

Abstract

A universal characterization of non-Markovianity for any open hybrid quantum systems is presented. This formulation is based on the negativity volume of the generalized Wigner function, which serves as an indicator of the quantum correlations in any composite quantum systems. It is shown, that the proposed measure can be utilized for any single or multi-partite quantum system, containing any discrete or continuous variables. To demonstrate its power in revealing non-Markovianity in such quantum systems, we additionally consider a few illustrative examples.