Performance of passive decoy-state quantum key distribution with mismatched local detectors

作     者：Kai Yu Chun-Hui Zhang Xing-Yu Zhou Qin Wang 喻凯;张春辉;周星宇;王琴

作者机构：Institute of Quantum Information and TechnologyNanjing University of Posts and TelecommunicationsNanjing 210003China Key Laboratory of Quantum InformationUniversity of Science and Technology of ChinaChinese Academy of SciencesHefei 230026China National Laboratory of Solid State MicrostructuresNanjing UniversityNanjing 210093China 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2022年第74卷第1期

页      面：40-45页

核心收录：

学科分类：11[军事学] 1105[军事学-军队指挥学] 07[理学] 0839[工学-网络空间安全] 08[工学] 070201[理学-理论物理] 110505[军事学-密码学] 110503[军事学-军事通信学] 0702[理学-物理学] 

基　　金：We gratefully acknowledge the financial support from the National Key R&D Program of China(2018YFA0306400,2017YFA0304100) the National Natural Science Foundation of China(12074194,11774180,U19A2075,12104240,62101285) the Leading-edge technology Program of Jiangsu Natural Science Foundation(BK20192001) Natural Science Foundation of Jiangsu Province(BK20210582) NUPTSF(NY220122,NY220123) 

主　　题：quantum key distribution passive decoy state heralded single-photon source detector mismatch 

摘      要：In quantum key distribution(QKD),the passive decoy-state method can simplify the intensity modulation and reduce some of side-channel information leakage and modulation *** is usually implemented with a heralded single-photon *** Wang et al 2016(***.A 96032312),a novel passive decoy-state method is proposed by Wang et al,which uses two local detectors to generate more detection events for tightly estimating channel ***,in the original scheme,the two local detectors are assumed to be identical,including the same detection efficiency and dark count rate,which is often not satisfied in the realistic *** this paper,we construct a model for this passive decoy-state QKD scheme with two mismatched detectors and explore the effect on QKD performance with certain *** also take the finite-size effect into consideration,showing the performance with statistical *** results show that the efficiencies of local detectors affect the key rate more obviously than dark count rates.