Phase-matching quantum key distribution with imperfect sources  

作　　者：张晓旭 陆宜飞 汪洋 江木生 李宏伟 周淳 周雨 鲍皖苏 Xiao-Xu Zhang;Yi-Fei Lu;Yang Wang;Mu-Sheng Jiang;Hong-Wei Li;Chun Zhou;Yu Zhou;Wan-Su Bao(Henan Key Laboratory of Quantum Information and Cryptography,SSF IEU,Zhengzhou 450001,China;Synergetic Innovation Centre of Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China;Basic Department,SSF IEU,Zhengzhou 450001,China)

机构地区：[1]Henan Key Laboratory of Quantum Information and Cryptography,SSF IEU,Zhengzhou 450001,China [2]Synergetic Innovation Centre of Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China [3]Basic Department,SSF IEU,Zhengzhou 450001,China

出　　处：《Chinese Physics B》2023年第5期288-296,共9页中国物理B（英文版）

基　　金：the National Key Research and Development Program of China(Grant Nos.2020YFA0309702 and 2020YFA0309701);the National Natural Science Foundation of China(Grant No.62101597);the China Postdoctoral Science Foundation(Grant No.2021M691536);the Natural Science Foundation of Henan(Grant Nos.202300410534 and 202300410532);the Anhui Initiative in Quantum Information Technologies。

摘　　要：The huge discrepancies between actual devices and theoretical assumptions severely threaten the security of quantum key distribution.Recently,a general new framework called the reference technique has attracted wide attention in defending against the imperfect sources of quantum key distribution.Here,the state preparation flaws,the side channels of mode dependencies,the Trojan horse attacks,and the pulse classical correlations are studied by using the reference technique on the phase-matching protocol.Our simulation results highlight the importance of the actual secure parameters choice for transmitters,which is necessary to achieve secure communication.Increasing the single actual secure parameter will reduce the secure key rate.However,as long as the parameters are set properly,the secure key rate is still high.Considering the influences of multiple actual secure parameters will significantly reduce the secure key rate.These actual secure parameters must be considered when scientists calibrate transmitters.This work is an important step towards the practical and secure implementation of phase-matching protocol.In the future,it is essential to study the main parameters,find out their maximum and general values,classify the multiple parameters as the same parameter,and give countermeasures.

关 键 词：quantum key distribution reference technique imperfect sources PHASE-MATCHING 

分 类 号：O413[理学—理论物理] TN918.4[理学—物理]