对任意W态两步高效纠缠纯化方案  

Efficient Two-Step Entanglement Purification Protocol of Arbitrary W States

作　　者：韩菲 朱孟正[1] 潘垒 HAN Fei;ZHU Mengzheng;PAN Lei(School of Physics and Electronic Information,Huaibei Normal University,235000,Huaibei,Anhui,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：《淮北师范大学学报(自然科学版)》2025年第1期21-25,共5页Journal of Huaibei Normal University:Natural Sciences

基　　金：安徽省自然科学基金面上项目(1808085MA08);安徽省高等学校质量工程项目(2021jxtd255)。

摘　　要：为克服因环境噪声影响导致在量子通信信道中产生退相干效应,提出一种纠缠纯化协议。在使用线性光学器件且不需要额外辅助光子情况下将具有任意低纠缠三粒子W态分2步纯化为最大纠缠W态。方案所使用线性光学器件是由偏振分束器、光子探测器以及分裂状态参数波片组成。通过对纠缠系统系数进行归一化处理,将任意W状态参数实现统一,获取的最大纠缠态能够直接用于量子信息处理中。该协议基于后选择原则在仅使用线性光学器件且不需要额外辅助光子情况下就可实现,增强方案可操作性并且减少对量子资源浪费,在未来量子通信中有良好应用前景。In order to overcome the decoherence effect in the quantum communication channel caused by the influence of environmental noise,an entanglement purification protocol is proposed,which purifies the threeparticle W state with arbitrary low entanglement into the maximum entangled W state in two steps using linear optics and without additional auxiliary photons.The linear optics used in this scheme are composed of a polarization beam splitter,a photon detector and a split-state parameter waveplate.By normalizing the coefficients of the entangled system,the parameters of the arbitrary W state are unified,and the obtained maximum entangled state can be directly used in quantum information processing.Based on the principle of postselection,the protocol can be realized with only linear optics and no additional auxiliary photons,which enhances the operability of the scheme and reduces the waste of quantum resources,and has a good application prospect for quantum communication in the future.

关 键 词：量子通信 纠缠纯化 W态 分裂状态参数波片 多方通信 

分 类 号：O413[理学—理论物理] TN918[理学—物理]