Environment-assisted entanglement restoration and improvement of the fidelity for quantum teleportation

Environment-assisted entanglement restoration and improvement of the fidelity for quantum teleportation
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环境辅助的纠缠恢复和量子隐形传态保真度的提高

DOI:
10.1007/s11128-015-1111-0
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发表时间:
2015-11
影响因子:
2.5
通讯作者:
Zhang Shou
Zhang Shou
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Xu Xian-Mei;Cheng Liu-Yong;Liu A-Peng;Su Shi-Lei;Wang Hong-Fu;Zhang Shou

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提出了三种环境辅助方案,通过弱测量反转来抑制纠缠分布的幅度衰减消相干。基于对环境的测量和适当的弱测量反转操作,可以以较高的成功率和保真度恢复两个分离的参与者之间的初始纠缠态。在某些特定情况下,恢复的最佳并行度可以达到1,而不需要反向测量。此外,我们还具体证明了所提出的环境辅助纠缠恢复可以应用于量子隐形传态,从而显著提高隐形传送态的保真度。
Three environment-assisted schemes are proposed to suppress the amplitude damping decoherence for entanglement distribution via weak measurement reversal. Based on the measurement of environment and appropriate weak measurement reversal operations, the initial entangled state can be recovered between two separated participants with high success probability and fidelity. In some specific cases, the restored optimal concurrence could reach up to 1 without requirement of the reversing measurement. Moreover, we concretely show that the proposed environment-assisted entanglement restoration can be applied to quantum teleportation to significantly improve the fidelity of the teleported state.
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