Correlation dynamics of a qubit–qutrit system in a spin-chain environment with Dzyaloshinsky–Moriya interaction

doi:10.1088/1674-1056/23/2/020307

中国物理B ›› 2014, Vol. 23 ›› Issue (2): 20307-020307.doi: 10.1088/1674-1056/23/2/020307

Correlation dynamics of a qubit–qutrit system in a spin-chain environment with Dzyaloshinsky–Moriya interaction

杨阳, 王安民

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China

收稿日期:2013-04-26 修回日期:2013-07-11 出版日期:2013-12-12 发布日期:2013-12-12
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10975125).

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

Received:2013-04-26 Revised:2013-07-11 Online:2013-12-12 Published:2013-12-12
Contact: Yang Yang E-mail:yangyang@mail.ustc.edu.cn
About author:03.67.Mn; 03.65.Ud; 03.65.Yz
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10975125).

摘要/Abstract

摘要： 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.

关键词: quantum correlation, quantum discord, measurement-induced disturbance, Dzyaloshinsky–, Moriya interaction

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.

Key words: quantum correlation, quantum discord, measurement-induced disturbance, Dzyaloshinsky–, Moriya interaction

中图分类号: (Entanglement measures, witnesses, and other characterizations)

03.67.Mn

03.65.Ud (Entanglement and quantum nonlocality) 03.65.Yz (Decoherence; open systems; quantum statistical methods)

杨阳, 王安民. Correlation dynamics of a qubit–qutrit system in a spin-chain environment with Dzyaloshinsky–Moriya interaction[J]. 中国物理B, 2014, 23(2): 20307-020307.

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[J]. Chin. Phys. B, 2014, 23(2): 20307-020307.

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Correlation dynamics of a qubit–qutrit system in a spin-chain environment with Dzyaloshinsky–Moriya interaction

Correlation dynamics of a qubit–qutrit system in a spin-chain environment with Dzyaloshinsky–Moriya interaction

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