Sudden death and revival of entanglement of two qubits coupled collectively to a thermal reservoir

doi:10.1088/1674-1056/19/9/094203

中国物理B ›› 2010, Vol. 19 ›› Issue (9): 94203-094203.doi: 10.1088/1674-1056/19/9/094203

Sudden death and revival of entanglement of two qubits coupled collectively to a thermal reservoir

方卯发¹, 廖湘萍², 方见树²

(1)College of Physics and Information Science, Hunan Normal University, Changsha 410081, China; (2)College of Science, Hunan University of Technology, Zhuzhou 412008, China

收稿日期:2010-02-19 修回日期:2010-03-14 出版日期:2010-09-15 发布日期:2010-09-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 10374025), Hunan Provincial Natural Science Foundation of China (Grant No. 06JJ4003) and the Major Program for the Research Foundation of Education Bureau of Hunan Province,

Sudden death and revival of entanglement of two qubits coupled collectively to a thermal reservoir

Liao Xiang-Ping(廖湘萍)^a)^†, Fang Jian-Shu(方见树)^a), and Fang Mao-Fa(方卯发)^b)

^a College of Science, Hunan University of Technology, Zhuzhou 412008, China; ^b College of Physics and Information Science, Hunan Normal University, Changsha 410081, China

Received:2010-02-19 Revised:2010-03-14 Online:2010-09-15 Published:2010-09-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 10374025), Hunan Provincial Natural Science Foundation of China (Grant No. 06JJ4003) and the Major Program for the Research Foundation of Education Bureau of Hunan Province, China (Grant No. 08A015).

摘要/Abstract

摘要： In this paper, we investigate the entanglement of two qubits coupled collectively to a common thermal environment and find that the the collective decay can lead to a revival of the entanglement that has already been destroyed. We also show that the ability of the system to revival entanglement relies on the mean photon number of the thermal environment and the degree of entanglement of the initial state.

Abstract: In this paper, we investigate the entanglement of two qubits coupled collectively to a common thermal environment and find that the the collective decay can lead to a revival of the entanglement that has already been destroyed. We also show that the ability of the system to revival entanglement relies on the mean photon number of the thermal environment and the degree of entanglement of the initial state.

Key words: sudden death of entanglement, two qubits, the thermal reservoir

中图分类号:

4250

廖湘萍, 方见树, 方卯发. Sudden death and revival of entanglement of two qubits coupled collectively to a thermal reservoir[J]. 中国物理B, 2010, 19(9): 94203-094203.

Liao Xiang-Ping(廖湘萍), Fang Jian-Shu(方见树), and Fang Mao-Fa(方卯发). Sudden death and revival of entanglement of two qubits coupled collectively to a thermal reservoir[J]. Chin. Phys. B, 2010, 19(9): 94203-094203.

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Sudden death and revival of entanglement of two qubits coupled collectively to a thermal reservoir

Sudden death and revival of entanglement of two qubits coupled collectively to a thermal reservoir

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