Overview on the phenomenon of two-qubit entanglement revivals in classical environments

Abstract

The occurrence of revivals of quantum entanglement between separated open quantum systems has been shown not only for dissipative non-Markovian quantum environments but also for classical environments in absence of back-action. While the phenomenon is well understood in the first case, the possibility to retrieve entanglement when the composite quantum system is subject to local classical noise has generated a debate regarding its interpretation. This dynamical property of open quantum systems assumes an important role in quantum information theory from both fundamental and practical perspectives. Hybrid quantum-classical systems are in fact promising candidates to investigate the interplay among quantum and classical features and to look for possible control strategies of a quantum system by means of a classical device. Here we present an overview on this topic, reporting the most recent theoretical and experimental results about the revivals of entanglement between two qubits locally interacting with classical environments. We also review and discuss the interpretations provided so far to explain this phenomenon, suggesting that they can be cast under a unified viewpoint.

16 pages, 9 figures. Chapter written for the upcoming book "Lectures on general quantum correlations and their applications"

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Cited by in corpus (10)

• Monogamy of quantum correlations - a review
• Validity of Landauer principle and quantum memory effects via collision models
• Effects of classical fluctuating environments on decoherence and bipartite quantum correlations dynamics
• Dynamics of spatially indistinguishable particles and entanglement protection
• Entanglement dynamics of an arbitrary number of moving qubits in a common environment
• Entanglement dynamics of an open moving-biparticle system driven by classical-field
• Markovian dynamics for a quantum/classical system and quantum trajectories
• Emergence of maximal hidden quantum correlations and its trade-off with the filtering probability in dissipative two-qubit systems
• Memory effects in high-dimensional systems faithfully identified by Hilbert-Schmidt speed-based witness
• Entanglement revival can occur only when the system-environment state is not a Markov state