Universal evolution of non-classical correlations due to collective spontaneous emission

Abstract

We explore the spontaneous generation and decay of quantum correlations between two identical atoms coupled to a common Markovian environment in the presence of electromagnetic field modes. For this purpose, we analyze the dynamics of quantum correlations by employing the concurrence, the trace quantum discord and the local quantum uncertainty, for collective Dicke states. It is shown that the collective damping and dipole-dipole interaction plays a key role in enhancing nonclassical correlations during the process of intrinsic decoherence. The quantum correlations can be maintained over a long time but for small distance between the two atoms.

Influence of Stark-shift on quantum coherence and non-classical correlations for two two-level atoms interacting with a single-mode cavity field

“…It has recently attracted significant attention as an essential ingredient for powerful applications including quantum teleportation [19], dense coding [20], quantum cryptography [21] and telecloning [22]. In this regard, various proper entanglement measures have been proposed by employing a rigorous mathematical framework [23] and their time evolution has been studied in several quantum systems of two-level atoms [24][25][26]. It was believed that QE is tightly related to quantum correlations.…”

The dynamic behaviors of local quantum uncertainty for three-qubit X states under decoherence channels

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Enhancing the estimation precision of an unknown phase shift in multipartite Glauber coherent states via skew information correlations and local quantum Fisher information

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