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Correlation dynamics of a qubit–qutrit system in a spin-chain environment with Dzyaloshinsky–Moriya interaction |
Yang Yang (杨阳), Wang An-Min (王安民) |
Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China |
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Abstract 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.
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Received: 26 April 2013
Revised: 11 July 2013
Accepted manuscript online:
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PACS:
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03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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03.65.Yz
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(Decoherence; open systems; quantum statistical methods)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10975125). |
Corresponding Authors:
Yang Yang
E-mail: yangyang@mail.ustc.edu.cn
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About author: 03.67.Mn; 03.65.Ud; 03.65.Yz |
Cite this article:
Yang Yang (杨阳), Wang An-Min (王安民) Correlation dynamics of a qubit–qutrit system in a spin-chain environment with Dzyaloshinsky–Moriya interaction 2014 Chin. Phys. B 23 020307
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