Experimental investigation of the non-Markovian dynamics of classical and quantum correlations

TL;DR

This study experimentally explores how classical and quantum correlations evolve in a non-Markovian environment, revealing phenomena like sudden transitions, revivals, and control mechanisms relevant for quantum memory applications.

Contribution

It provides the first experimental observation of correlation dynamics, including revivals and control, in a non-Markovian environment for Bell diagonal states.

Findings

Quantum correlations revive due to phase refocusing.

Classical correlations remain constant despite non-Markovian effects.

Correlation revival times can be controlled using optical operations.

Abstract

We experimentally investigate the dynamics of classical and quantum correlations of a Bell diagonal state in a non-Markovian dephasing environment. The sudden transition from classical to quantum decoherence regime is observed during the dynamics of such kind of Bell diagonal state. Due to the refocusing effect of the overall relative phase, the quantum correlation revives from near zero and then decays again in the subsequent evolution. However, the non-Markovian effect is too weak to revive the classical correlation, which remains constant in the same evolution range. With the implementation of an optical $\sigma_{x}$ operation, the sudden transition from quantum to classical revival regime is obtained and correlation echoes are formed. Our method can be used to control the revival time of correlations, which would be important in quantum memory.