Two-step hyperentanglement purification with the quantum-state-joining method

Two-step hyperentanglement purification with the quantum-state-joining method
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使用量子态连接方法进行两步超纠缠纯化

DOI:
10.1103/physreva.90.052309
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发表时间:
2014-08
期刊:
影响因子:
2.9
通讯作者:
Deng, Fu-Guo
Deng, Fu-Guo
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Ren, Bao-Cang;Du, Fang-Fang;Deng, Fu-Guo

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超纠缠在量子信息处理中是一种很有前途的资源,特别是在增加远程量子通信的信道容量方面。在具有噪声信道的长距离量子通信过程中,超纠缠净化是从混合超纠缠态中获得高保真非局域超纠缠态的重要方法。在这里,我们提出了一种两步超纠缠净化协议,用于具有偏振位翻转错误和空间模相位翻转错误的非局部混合超纠缠态,该协议采用偏振-空间相位检查量子非拆除检测器和量子态连接方法(QSJM)。使用QSJM,该协议可以保留在以前的超纠缠净化协议中丢弃的状态。它具有效率高的优点,可用于远距离大容量量子通信中改善多自由度光子系统的纠缠态。
Hyperentanglement is a promising resource in quantum information processing, especially for increasing the channel capacity of long-distance quantum communication. Hyperentanglement purification is an important method to obtain high-fidelity nonlocal hyperentangled states from mixed hyperentangled states in a long-distance quantum communication process with noisy channels. Here, we present a two-step hyperentanglement purification protocol for nonlocal mixed hyperentangled states with polarization bit-flip errors and spatial-mode phase-flip errors, resorting to polarization-spatial phase-check quantum nondemolition detectors and the quantum-state-joining method (QSJM). With QSJM, the protocol can preserve the states that are discarded in the previous hyperentanglement purification protocols. It has the advantage of a high efficiency, and it is useful for improving the entanglement of photon systems with several degrees of freedom in long-distance high-capacity quantum communication.
DOI: 10.1103/physreva.82.032318
发表时间: 2010-09
期刊: Physical Review A
影响因子: 2.9
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通讯作者: Deng, Fu-Guo
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发表时间: 1996-01-29
影响因子: 8.6
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