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

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

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.

Keywords: sudden death of entanglement two qubits the thermal reservoir

Received: 19 February 2010
Revised: 14 March 2010
Accepted manuscript online:

PACS:

4250

Fund: 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).

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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 2010 Chin. Phys. B 19 094203

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

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