摘要
连续变量量子密钥分发(CV-QKD)协议的一个重要组成部分是数据协商。在连续变量量子密钥分发的多维协商协议中引入了极化码,提出了两种不同的基于极化码的多维协商协议。该协议包含多维协商和极化码纠错两个组成模块。利用多维协商模块可将原始长密钥分为多个d维向量组,每组向量经过归一化、球面化和旋转处理变为二进制密钥串。而利用极化码纠错模块,通信双方可共同分享冻结位置信息和冻结比特值,实现基于极化码的逆向数据协商。该协议的可行性通过数值仿真得到了证明,与现有的极化码逆向协商协议相比,该协议可以在纠错成功率保持不变的条件下获得更高的协商效率。
Information reconciliation is an important part of a continuous-variable quantum key distribution(CV-QKD)system.Polar code is applied to multidimensional reconciliation protocols for CV-QKD,and two new polar code multidimensional reconciliation protocols are proposed in this work.The new protocol consists of the multidimensional algorithm part and error correction part.In the first part,the long sifted key can be divided into a set of d-dimension vectors,and then each group of vectors can be transformed to a binary data after normalization,spheroidization and rotation.In the second part,the communication parties can share the frozen position information and frozen bit value,and realize the reverse information reconciliation based on the polar code.The simulation results show that compared with the original inverse polar code reconciliation protocol,the proposed protocol can achieve higher negotiation efficiency while the error correction success rate remains unchanged.
作者
周文婷
王鑫
卞宇翔
乔涵
冯宝
ZHOU Wenting;WANG Xin;BIAN Yuxiang;QIAO Han;FENG Bao(Information and Communication Company of State Grid Xinjiang Electric Power Co.,Ltd,Urumqi 830000,China;NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 211106,China;NRGD Quantum Technology Co.,Ltd.,Nanjing 211106,China)
出处
《量子电子学报》
CAS
CSCD
北大核心
2021年第4期460-467,共8页
Chinese Journal of Quantum Electronics
基金
国网新疆电力有限公司信息通信公司科技项目,SGXJXT00JFJS2000097。
关键词
量子通信
量子密钥分发
连续变量
多维协商
极化码
逆向协商
协商效率
quantum communication
quantum key distribution
continuous variable
multidimensional reconciliation
polar code
inverse reconciliation
reconciliation efficiency
