Quantum secure direct communication with entanglement source and single-photon measurement
Quantum secure direct communication with entanglement source and single-photon measurement作者机构:State Key Laboratory of Low-Dimensional Quantum Physics and Department of PhysicsTsinghua UniversityBeijing 100084China Frontier Science Center for Quantum InformationBeijing 100084China School of Information and TechnologyTsinghua UniversityBeijing 100084China Beijing National Research Center for Information Science and TechnologyBeijing 100084China Beijing Academy of Quantum Information SciencesBeijing 100093China
出 版 物:《Science China(Physics,Mechanics & Astronomy)》 (中国科学:物理学、力学、天文学(英文版))
年 卷 期:2020年第63卷第11期
页 面:12-19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:supported by the National Key Research and Development Program of China(Grant No.2017YFA0303700) the Key Research and Development Program of Guangdong Province(Grant No.2018B030325002) the National Natural Science Foundation of China(Grant Nos.61727801,61871257,and 11774197) the Beijing Advanced Innovation Center for Future Chip(ICFC)
主 题:quantum secure direct communication quantum secure communication quantum communication quantum information
摘 要:Quantum secure direct communication(QSDC)transmits information directly over a quantum *** addition to security in transmission,it avoids loopholes of key loss and prevents the eavesdropper from getting *** this article,we propose a QSDC protocol using entangled photon *** protocol differs from existing entanglement-based QSDC protocols because it does not perform Bell-state measurement,and one photon of the entangled pair is measured after the entanglement *** has the advantage of high signal-to-noise ratio due to the heralding function of entanglement pairs,and it also has the relative ease in performing single-photon *** protocol can use a practical entanglement source from spontaneous parametric down-conversion(SPDC);Gottesman-Lo-Lu¨tkenhaus-Preskill theory and the decoy state method give a better estimate of the error *** analysis is completed with Wyner’s wiretap channel theory,and the lower bound of the secrecy capacity is *** simulations were carried out to study the performance of the *** simulations demonstrated that the protocol with a practical SPDC entanglement source performed well and was close to the case with an ideal entanglement source.