Dynamics of quantum correlations and linear entropy in a multi-qubit-cavity system
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.
Cite
@article{arxiv.quant-ph/0311181,
title = {Dynamics of quantum correlations and linear entropy in a multi-qubit-cavity system},
author = {Alexandra Olaya-Castro and Neil F. Johnson and Luis Quiroga},
journal= {arXiv preprint arXiv:quant-ph/0311181},
year = {2009}
}
Comments
New discussions on the generality of entanglement-entropy relationship, one new reference, and other minor changes. 10 pages, 6 figures, accepted for publication in J.Opt. B: "Special Issue on Fluctuations & Noise in Photonics & Quantum Optics."