Dynamics of quantum correlations and linear entropy in a multi-qubit-cavity system

Details Dynamics of quantum correlations and linear entropy in a multi-qubit-cavity system Dynamics of quantum correlations and linear entropy in a multi-qubit-cavity system

2003-11-26

arxiv.org/abs/quant-ph/0311181v2

J. Opt. B: Quantum Semiclass. Opt. 6 (2004) S730-S735.

Physics

Quantum Physics

New discussions on the generality of entanglement-entropy relationship, one new reference, and other minor changes. 10 pages,

Scientific paper

10.1088/1464-4266/6/8/016

We present a theoretical study of the relationship between entanglement and entropy in multi-qubit quantum optical systems. Specifically we investigate quantitative relations between the concurrence and linear entropy for a two-qubit mixed system, implemented as two two-level atoms interacting with a single-mode cavity field. The dynamical evolutions of the entanglement and entropy, are controlled via time-dependent cavity-atom couplings. Our theoretical findings lead us to propose an alternative measure of entanglement, which could be used to develop a much needed correlation measure for more general multi-partite quantum systems.

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