| Sudden death and revival of entanglement of two qubits coupled collectively to a thermal reservoir |
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| 作者姓名： | 廖湘萍 方见树 方卯发 |
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| 作者单位： | College of Science, Hunan University of Technology, Zhuzhou 412008, China;College of Science, Hunan University of Technology, Zhuzhou 412008, China;College of Physics and Information Science, Hunan Normal University, Changsha 410081, China |
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| 基金项目： | 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, |
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| 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.
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| 关 键 词： | sudden death of entanglement two qubits the thermal reservoir |
| 收稿时间： | 2010-02-19 |
Sudden death and revival of entanglement of two qubits coupled collectively to a thermal reservoir |
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| Liao Xiang-Ping,Fang Jian-Shu and Fang Mao-Fa.Sudden death and revival of entanglement of two qubits coupled collectively to a thermal reservoir[J].Chinese Physics B,2010,19(9):94203-094203. |
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| Authors: | Liao Xiang-Ping Fang Jian-Shu and Fang Mao-Fa |
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| Affiliation: | College of Physics and Information Science, Hunan Normal University, Changsha 410081, China; College of Science, Hunan University of Technology, Zhuzhou 412008, China |
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| 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. |
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| Keywords: | sudden death of entanglement two qubits the thermal reservoir |
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