Quantum correlation of a three-particle W-class state under quantum decoherence

doi:10.1088/1674-1056/22/10/100306

中国物理B ›› 2013, Vol. 22 ›› Issue (10): 100306-100306.doi: 10.1088/1674-1056/22/10/100306

Quantum correlation of a three-particle W-class state under quantum decoherence

许鹏, 王栋, 叶柳

School of Physics and Material Science, Anhui University, Hefei 230039, China

收稿日期:2013-01-24 修回日期:2013-04-02 出版日期:2013-08-30 发布日期:2013-08-30
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11074002, 61275119, and 11247256), the Doctoral Science Foundation of the Ministry of Education of China (Grant No. 20103401110003), the Fund of the Education Department of Anhui Province for Outstanding Youth, China (Grant No. 2012SQRL023), the Doctor Scientific Research Fund of Anhui University, China (Grant No. 33190058), and the Personal Development Foundation of Anhui Province, China (Grant No. 2008Z018).

Quantum correlation of a three-particle W-class state under quantum decoherence

Xu Peng (许鹏), Wang Dong (王栋), Ye Liu (叶柳)

School of Physics and Material Science, Anhui University, Hefei 230039, China

Received:2013-01-24 Revised:2013-04-02 Online:2013-08-30 Published:2013-08-30
Contact: Ye Liu E-mail:yeliu@ahu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11074002, 61275119, and 11247256), the Doctoral Science Foundation of the Ministry of Education of China (Grant No. 20103401110003), the Fund of the Education Department of Anhui Province for Outstanding Youth, China (Grant No. 2012SQRL023), the Doctor Scientific Research Fund of Anhui University, China (Grant No. 33190058), and the Personal Development Foundation of Anhui Province, China (Grant No. 2008Z018).

摘要/Abstract

摘要： We investigate the quantum characteristics of a three-particle W-class state and reveal the relationship between quantum discord and quantum entanglement under decoherence. We can also identify the state for which discord takes a maximal value for a given decoherence factor, and present a strong bound on quantum entanglement-quantum discord. In contrast, a striking result will be obtained that the quantum discord is not always stronger than the entanglement of formation in the case of decoherence. Furthermore, we also theoretically study the variation trend of the monogamy of quantum correlations for the three-particle W-class state under the phase flip channel, and find that the three-particle W-class state could transform from polygamous into monogamous, owing to the decoherence.

关键词: quantum correlations, quantum entanglement, quantum discord, W-class state

Abstract: We investigate the quantum characteristics of a three-particle W-class state and reveal the relationship between quantum discord and quantum entanglement under decoherence. We can also identify the state for which discord takes a maximal value for a given decoherence factor, and present a strong bound on quantum entanglement–quantum discord. In contrast, a striking result will be obtained that the quantum discord is not always stronger than the entanglement of formation in the case of decoherence. Furthermore, we also theoretically study the variation trend of the monogamy of quantum correlations for the three-particle W-class state under the phase flip channel, and find that the three-particle W-class state could transform from polygamous into monogamous, owing to the decoherence.

Key words: quantum correlations, quantum entanglement, quantum discord, W-class state

中图分类号: (Entanglement and quantum nonlocality)

03.65.Ud

03.67.-a (Quantum information) 03.67.Mn (Entanglement measures, witnesses, and other characterizations)

许鹏, 王栋, 叶柳. Quantum correlation of a three-particle W-class state under quantum decoherence[J]. 中国物理B, 2013, 22(10): 100306-100306.

Xu Peng (许鹏), Wang Dong (王栋), Ye Liu (叶柳). Quantum correlation of a three-particle W-class state under quantum decoherence[J]. Chin. Phys. B, 2013, 22(10): 100306-100306.

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Quantum correlation of a three-particle W-class state under quantum decoherence

Quantum correlation of a three-particle W-class state under quantum decoherence

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