基于相邻中继站间制备纠缠资源的高效量子中继器方案  

An Efficient Quantum Repeater Scheme Based on Preparing Entangled Resources Between Two Adjacent Stations

作　　者：苏梦远 朱孟正[1] SU Meng-yuan;ZHU Meng-zheng(School of Physics&Electronic Information,Huaibei Normal University,Huaibei 235000,China)

机构地区：[1]淮北师范大学物理与电子信息学院,安徽淮北235000

出　　处：《长春师范大学学报》2023年第2期35-39,共5页Journal of Changchun Normal University

基　　金：国家自然科学基金资助项目“二维聚合物g-C 3N 4基梯型异质结有机无机复合光催化剂制备与产氢性能”(51973078);安徽省自然科学基金面上项目“用相干光脉冲作为量子通信总线实现远程量子操控”(1808085MA08);安徽省高等学校质量工程项目“大学物理教学团队”(2021jxtd255)。

摘　　要：利用相干态通信制备高保真贝尔对,呈现了一个实现长距离量子通信系统的中继器方案。该方案的主要装置由线性光学器件和基于弱的非线性的奇偶校验门构成。方案的优点是仅用单光子作为制备纠缠对的资源,便可以在两个相邻的中继站点间直接产生保真度接近于1的贝尔纠缠对。与将贝尔对分布到两个相邻的站点相比,该方案避免了纠缠分布过程中最大纠缠EPR对的退相干效应。This paper presents a repeater scheme for long-distance quantum communication systems by preparing high-fidelity Bell pairs using coherent state communication.The main setup is composed of PBS processing individual photons and a parity gate working with weak cross-Kerr nonlinearity.The advantage of this scheme is that Bell entangled pairs with fidelity close to 1 can be directly generated between two adjacent stations.Only individual photons are used as resource for prepare entangled pairs.As compared to distributing Bell pairs to two adjacent stations,this scheme eliminates the decoherence effect of maximum entangled EPR pairs during entanglement distribution.

关 键 词：量子中继器 量子通信 量子纠缠 量子纯化 

分 类 号：O431.2[机械工程—光学工程] O413.2[理学—光学]