基于标记配对相干态的量子密钥分配协议的统计涨落分析  

Statistical Fluctuation Analysis of Quantum Key Distribution Protocols Based on Heralded Pair Coherent State

作　　者：何业锋[1,3] 赵艳坤 郭佳瑞 李春雨 He Yefeng;Zhao Yankun;Guo Jiarui;Li Chunyu(School of Cyberspace Security,Xi'an University of Posts and Telecommunications,Xi'an,shaanxi 710121,China;School of Communication and In formation Engineering,Xi'an University of Posts and Telecommunications,Xi'an,shaanxi 710121,China;National Engineering Laborutory for Wireless Security,Xi'an University of Posts and Telecommunications,Xi'an,shaan.xi 710121,China)

机构地区：[1]西安邮电大学网络空间安全学院,陕西西安710121 [2]西安邮电大学通信与信息工程学院,陕西西安710121 [3]西安邮电大学无线网络安全技术国家工程实验室,陕西西安710121

出　　处：《光学学报》2020年第7期165-171,共7页Acta Optica Sinica

基　　金：国家自然科学基金(61802302,61772418)。

摘　　要：为了更加全面分析测量设备无关量子密钥分配协议,对基于标记配对相干态的测量设备无关量子密钥分配协议进行了统计涨落分析。首先分析了当光源在统计涨落时,随着发送信号脉冲数的增加,误码率和密钥生成率与传输距离的关系。结果表明,增加脉冲数能增大密钥生成率和最大传输距离,降低误码率,且基于标记配对相干态的协议性能比基于指示单光子源的协议性能要好。进一步分析了光源在统计涨落时,基于标记配对相干态的测量设备无关量子密钥分配协议在非对称信道中的密钥生成率与传输距离的关系,由仿真结果得知,非对称信道时的性能比对称信道时的性能好。In order to analyze the measurement-device-independent quantum key distribution protocol more comprehensively, the statistical fluctuation analysis of measurement-device-independent quantum key distribution protocols based on heralded pair coherent state is carried out. First, with the increase of the number of transmitted signal pulses in the statistical fluctuation of light source, the relationships of bit error rate and key generation rate with transmission distance are analyzed. The results show that increasing the number of pulses can improve the key generation rate and the maximum transmission distance, and can reduce the bit error rate. Moreover, the measurement-device-independent quantum key distribution protocol based on heralded pair coherent state has better performance than the one based on heralded single photon sources. When the light source is statistical fluctuating, the relationship between the key generation rate and the transmission distance of measurement-device-independent quantum key distribution protocol based on heralded pair coherent state in asymmetric channels is further analyzed, and the simulation results show that this protocol in asymmetric channels has better performance than that in symmetric channels.

关 键 词：量子光学 量子密钥分配 测量设备无关 标记配对相干态 非对称信道 

分 类 号：TN918[电子电信—通信与信息系统]