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Physica A Statistical Mechanics and its Applications

Quantum communication in spin chains with three-site and Dzyaloshinsky–Moriya interactions

Zheng-Da Hu, Qi-Liang He, Jing‐Bo Xu

Published Jul 16, 2012• 9 citations
Publisher
DOI
10.1016/j.physa.2012.06.057

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We study the dynamics of correlations for a hybrid qubit—qutrit system in an XY spin-chain environment with Dzyaloshinsky—Moriya interaction. Our discussion involves a comparative analysis of negativity, quantum discord, and measurement-induced disturbance. It is found that the quantum discord is optimal of the three quantum correlations to detect the critical point of quantum phase transition. Only when the qubit interacts with the environment, is the phenomenon of sudden transition between the classical correlation and the quantum discord observed. Moreover, the Dzyaloshinsky—Moriya interaction enhances the decay of quantum correlations.