Practical decoy-state quantum secure direct communication

查看全文 作　　者：Xin [1]Liu;Zijian [1]Li;Di [1]Luo;Chunfeng [1]Huang;Di [1]Ma;Minming [2]Geng;Junwei [3]Wang;Zhenrong [2]Zhang;Kejin [1]Wei

机构地区：[1]Guangxi Key Laboratory for Relativistic Astrophysics,School of Physical Science and Technology,Guangxi University,Nanning 530004,China;[2]Guangxi Key Laboratory of Multimedia Communications and Network Technology,School of Computer,Electronics,and Information,Guangxi University,Nanning 530004,China;[3]CAS Quantum Network Co.,Ltd,Shanghai 201315,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》索引2021年第64卷第12期,共8页

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.62171144,62031024,and 11865004);the Guangxi Science Foundation(Grant No.2017GXNSFBA198231)。 摘　　要：Quantum secure direct communication(QSDC) has been demonstrated in both fiber-based and free-space channels using attenuated lasers. Decoy-state QSDC by exploiting four decoy states has been proposed to address the problem of photon-numbersplitting attacks caused by the use of attenuated lasers. In this study, we present an analysis of the practical aspects of decoy-state QSDC. First, we design a two-decoy-state protocol that only requires two decoy states, thereby significantly reducing experimental complexity. Second, we successfully perform full parameter optimization for a real-life QSDC system by introducing a genetic algorithm. Our simulation results show that the two-decoy-state protocol could be the best choice for developing a practical QSDC system. Furthermore, full optimization is crucial for a high-performance QSDC system. Our work serves as a major step toward the further development of practical decoy-state QSDC systems. 关键词：quantum secure direct communication decoy-state method full parameter optimization

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Practical decoy-state quantum secure direct communication

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