Restoring distribution entanglement via environment-assisted measurement and quantum measurement reversal under various decoherence sources

Restoring distribution entanglement via environment-assisted measurement and quantum measurement reversal under various decoherence sources
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通过环境辅助测量和各种退相干源下的量子测量反转来恢复分布纠缠

DOI:
10.1088/1555-6611/ab3daa
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发表时间:
2019-09
期刊:
影响因子:
1.2
通讯作者:
Li Wen Juan
Li Wen Juan
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Wang Qiong;Peng Gao Feng;Li Wen Juan

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我们考察了环境辅助测量(EAM)和量子测量反转(QMR)操作在三种典型噪声量子信道下恢复任意纠缠两体纯态分布纠缠中的有效性。我们推导了最优最终量子纠缠的精确表达式,明确地表明EAM和QMR操作确实有助于从振幅衰减、相位衰减和退偏振中恢复分布纠缠。与弱测量方法和QMR方法得到的结果相比,我们的结果在适应范围和成功概率上显示出显著的优势。
We examine the validity of the environment-assisted measurement (EAM) and quantum measurement reversal (QMR) operation in the restoration of distributed entanglement for an arbitrarily entangled bipartite pure state under three kinds of typical noisy quantum channels. We derive the exact expressions of the optimal final quantum entanglement, show explicitly that the EAM and QMR operation indeed helps for recovering the distributed entanglement from amplitude damping, phase damping and depolarizing. Comparing with the results obtained by the method of weak measurement and QMR, our results show notable superiorities on adaptation scope and success probability.
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