基于C-GHZ态实现近乎完整的逻辑贝尔态分析  

Realize Nearly Complete Logical Bell State Analysis Based on C-GHZ State

作　　者：韩菲 朱孟正[1] HAN Fei;ZHU Mengzheng(School of Physics&Electronic Information,Huaibei Normal University,Huaibei 235000,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：《山西师范大学学报（自然科学版）》2024年第4期31-36,共6页Journal of Shanxi Normal University(Natural Science Edition)

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：通过现有理论证明,新型宏观薛定谔“猫态”的叠加态即:逻辑量子位的级联Greenberger-Horne-Zeilinger(C-GHZ)态在实际含噪声的环境中相较于普通的Greenberger-Horne-Zeilinger(GHZ)态具有很强的鲁棒性,抗噪声能力更强等特点.因此,基于逻辑量子比特纠缠C-GHZ态,实现长距离量子通信和大规模量子网络是更具可行性的.依据先前的理论验证,提出了一个在仅使用简单线性光学器件以及基于电子系统的非破坏测量装置P门可以近似完全区分出逻辑贝尔态的理论方案,提高了量子资源的利用率,降低相位噪声,实验的可操作性得到进一步提升.该方案也可以区分具有N个逻辑量子位的任意C-GHZ状态.Through existing theories,it has been proven that the superposition state of the new macroscopic Schrödinger“cat state”,that is,the concatenated Greenberger-Horne-Zeilinger(C-GHZ)state of logical qubits is better than the ordinary GHZ state in an actual noisy environment.The C-GHZ state has strong robustness and stronger anti-noise ability.Therefore,it is more feasible to realize long-distance quantum communication and large-scale quantum networks based on entangled C-GHZ states of logical qubits.Due to previous theoretical verification,a theoretical solution is proposed that can approximately completely distinguish logical Bell states using only simple linear optical devices and a non-destructive measurement device based on electronic systems,P-gate,which improves the utilization of quantum resources and reduces phase noise.In the scheme the operability of the experiment is further improved.This scheme can also distinguish arbitrary C-GHZ states with N logical qubits.

关 键 词：量子通信 量子纠缠 贝尔态分析 C-GHZ态 

分 类 号：O413.3[理学—理论物理] TN912[理学—物理] TP385[电子电信—通信与信息系统]