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

Alexandra Olaya-Castro·Neil F. Johnson·Luis Quiroga
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Abstract

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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Alexandra Olaya-Castro, Neil F. Johnson, Luis Quiroga. 2004-03-09. Dynamics of quantum correlations and linear entropy in a multi-qubit-cavity system. https://doi.org/10.1088/1464-4266/6/8/016

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