Polarization entanglement purification of nonlocal microwave photons based on the cross-Kerr effect in circuit QED
Polarization entanglement purification of nonlocal microwave photons based on the cross-Kerr effect in circuit QED
复制标题
基于电路QED中交叉克尔效应的非局域微波光子偏振纠缠净化
DOI：
10.1103/physreva.96.052330
复制
发表时间：
2017-09
影响因子：
2.9
通讯作者：
Fu-Guo Deng
中科院分区：
文献类型：
--
作者：
Hao Zhang;Qian Liu;Xu-Sheng Xu;Jun Xiong;Ahmed Alsaedi;Tasawar Hayat;Fu-Guo Deng
随着第一颗量子卫星的成功发射，微波光子已成为量子通信中非常重要的量子比特。因此，确保微波量子通信的高安全性和高效性是一项必要而有意义的任务。本文提出了一种基于电路量子电动力学（QED）中交叉克尔效应的非局域微波光子偏振纠缠净化方案。该协议解决了用于构建量子信道的最大纠缠态的纯度因环境噪声的退相干而降低的问题。该任务是通过偏振奇偶校验量子不拆除（QND）探测器、位翻转操作和线性微波元件来完成的。QND探测器由多个交叉克尔效应系统组成，通过将两个超导传输线谐振器耦合到具有n型能级结构的超导分子上实现交叉克尔效应。给出了电路QED中适用于QND测量系统的实验参数，并对其保真度进行了分析。该协议在微波光子辅助下的远距离量子通信中具有良好的应用前景，如卫星量子通信。
Microwave photons have become very important qubits in quantum communication as the first quantum satellite has been launched successfully. Therefore, it is a necessary and meaningful task for ensuring the high security and efficiency of microwave-based quantum communication in practice. Here, we present an original polarization entanglement purification protocol for nonlocal microwave photons based on the cross-Kerr effect in circuit quantum electrodynamics (QED). Our protocol can solve the problem that the purity of maximally entangled states used for constructing quantum channels will decrease due to decoherence from environment noise. This task is accomplished by means of the polarization parity-check quantum nondemolition (QND) detector, the bit-flipping operation, and the linear microwave elements. The QND detector is composed of several cross-Kerr effect systems which can be realized by coupling two superconducting transmission line resonators to a superconducting molecule with the N-type level structure. We give the applicable experimental parameters of QND measurement system in circuit QED and analyze the fidelities. Our protocol has good applications in long-distance quantum communication assisted by microwave photons in the future, such as satellite quantum communication.
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影响因子：
2
作者：
J. Siewert;R. Fazio;G. Palma;E. Sciacca
通讯作者：
J. Siewert;R. Fazio;G. Palma;E. Sciacca
DOI：
10.1117/12.483026
发表时间：
2002-09
期刊：
--
影响因子：
--
作者：
G. Guo;Guangcan Guo
通讯作者：
G. Guo;Guangcan Guo
影响因子：
2.9
作者：
Ren, Bao-Cang;Du, Fang-Fang;Deng, Fu-Guo
通讯作者：
Deng, Fu-Guo
基于交叉克尔非线性参量下转换源的高效偏振纠缠纯化
影响因子：
2.9
作者：
Deng, Fu-Guo;Zhou, Hong-Yu;Sheng, Yu-Bo
通讯作者：
Sheng, Yu-Bo
影响因子：
3.2
作者：
D. Solli;C. Mccormick;R. Chiao;J. Hickmann
通讯作者：
D. Solli;C. Mccormick;R. Chiao;J. Hickmann