Suppressing entanglement sudden death by initialsystem-environment correlation

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YUE Ping, ZHENG Qiang and REN Zhong-Zhou. Suppressing entanglement sudden death by initialsystem-environment correlation[J]. Chinese Physics C, 2012, 36(7): 592-596. doi: 10.1088/1674-1137/36/7/004
YUE Ping, ZHENG Qiang and REN Zhong-Zhou. Suppressing entanglement sudden death by initialsystem-environment correlation[J]. Chinese Physics C, 2012, 36(7): 592-596.  doi: 10.1088/1674-1137/36/7/004 shu
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Received: 2011-11-28
Revised: 2012-02-09
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Suppressing entanglement sudden death by initialsystem-environment correlation

    Corresponding author: ZHENG Qiang,
    Corresponding author: REN Zhong-Zhou,

Abstract: This paper studies the entanglement dynamics of the system S composed of two non-interactional qubits A and B. The third qubit C is its environment, E, which only interacts with the S qubit B by the Dzyaloshinskii-Moriya spin-orbit coupling. Considering the following states as the whole (S+E): the initially S-E correlated state and the separable one, the entanglement of S has no sudden death for the former case. This result sheds some light on the control of quantum entanglement, which will be helpful for quantum information processing.

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