中国物理B ›› 2010, Vol. 19 ›› Issue (10): 100312-100312.doi: 10.1088/1674-1056/19/10/100312

• • 上一篇    下一篇

Passive decoy state SARG04 quantum-key-distribution with practical photon-number resolving detectors

许方星, 王双, 韩正甫, 郭光灿   

  1. Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
  • 收稿日期:2010-03-25 修回日期:2010-05-11 出版日期:2010-10-15 发布日期:2010-10-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2006CB921900), the National Natural Science Foundation of China (Grant Nos. 60537020 and 60621064) and the Innovation Funds of the Chinese Academy of Sciences.

Passive decoy state SARG04 quantum-key-distribution with practical photon-number resolving detectors

Xu Fang-Xing(许方星), Wang Shuang(王双), Han Zheng-Fu(韩正甫)†ger, and Guo Guang-Can(郭光灿)   

  1. Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
  • Received:2010-03-25 Revised:2010-05-11 Online:2010-10-15 Published:2010-10-15
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2006CB921900), the National Natural Science Foundation of China (Grant Nos. 60537020 and 60621064) and the Innovation Funds of the Chinese Academy of Sciences.

摘要: SARG04 protocol has its advantages in defending photon number splitting attack, benefited from two-photon pulses part. In this paper, we present a passive decoy state SARG04 scheme combining with practical photon number resolving (PNR) detectors. Two kinds of practical detectors, transition-edge sensor and time-multiplexing detector, are taken into consideration. Theoretical analysis shows that both of them are compatible with the passive decoy state SARG04. Compared with the original SARG04, two detectors can boost the key generation rate and maximal secure distance obviously. Meanwhile, the result shows that quantum efficiency and dark count of the detector influence the maximal distance slightly, which indicates the prospect of implementation in real quantum key distribution system with imperfect practical PNS detectors.

Abstract: SARG04 protocol has its advantages in defending photon number splitting attack, benefited from two-photon pulses part. In this paper, we present a passive decoy state SARG04 scheme combining with practical photon number resolving (PNR) detectors. Two kinds of practical detectors, transition-edge sensor and time-multiplexing detector, are taken into consideration. Theoretical analysis shows that both of them are compatible with the passive decoy state SARG04. Compared with the original SARG04, two detectors can boost the key generation rate and maximal secure distance obviously. Meanwhile, the result shows that quantum efficiency and dark count of the detector influence the maximal distance slightly, which indicates the prospect of implementation in real quantum key distribution system with imperfect practical PNS detectors.

Key words: quantum key distribution, photon-number-resolving detector

中图分类号:  (Quantum cryptography and communication security)

  • 03.67.Dd
03.67.Hk (Quantum communication)