Controlling sudden transition from classical to quantum decoherence via non-equilibrium environments

• Published in: New journal of physics Vol. 22; no. 3; pp. 33039 - 33048
• Main Authors: Basit, Abdul, Ali, Hamad, Badshah, Fazal, Yang, Xiao-Fei, Ge, Guo-Qin
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01-03-2020
• Subjects: Correlation; Decay rate; Equilibrium; Freezing; non-Markovian noise; non-stationary statistical process; Parameters; Physics; quantum and classical correlations; quantum information; Quantum theory; Qubits (quantum computing)
• ISSN: 1367-2630; 1367-2630
• DOI: 10.1088/1367-2630/ab76f6

We investigate the freezing and sudden transition in the dynamical behavior of quantum and classical correlations in a system composed of two identical non-interacting qubits locally subjected to their own non-equilibrium environments. In contrast to the equilibrium case, one can observe striking results when a bipartite quantum system couples with the non-equilibrium dephasing environment with non-stationary and non-Markovian features. Remarkably, the finite time interval in which the quantum correlation remains impervious to decoherence can be further prolonged as the environment deviates from equilibrium. This reveals that the non-equilibrium parameter provides an alternative tool to efficiently control the appearance of a sudden transition in the decay rates of correlations and their immunity towards the decoherence. Furthermore, for certain initial states, the appearance of another time-interval over which quantum correlation remains constant and the revival of classical correlation not only depends on the non-Markovianity but also on the non-equilibrium parameter.