Scarani-Acin-Ribordy-Gisin Decoy-State Protocols in Quantum Key Distribution with a Heralded Single Photon Source

摘要：

Decoy states have recently been proposed as a useful method for substantially improving the performance of quantum key distribution (QKD). Considering the scarani-Acin-Ribordy-Gisin protocol (SARG04) with a heralded single photon source (HSPS), we review the general model of HSPS QKD system with a threshold detector, and analyze the SARG04 non-decoy-state protocol, SARG04 infinite active decoy-state protocol and SARG04 decoy-state protocol combining active decoy state method and passive decoy state method. Furthermore, we discuss the choice of optimal signal intensity for HSPS QKD with and without decoy states and obtain the condition that the optimal signal intensity satisfies. The simulation and analysis results show that the decoy state method can substantially improve the performance of SARG04 protocol with HSPS and the performance of SARG04 protocol with HSPS is better than that of BB84 protocol with HSPS. The decoy state method weakens the dependence of the optimal signal intensity on the overall transmission probability.

关键词： quantum key distribution decoy state heralded single photon source Scarani-Acin-Ribordy-Gisin protocol optimal signal intensity key generation rate.

作者: Yuanyuan Zhou Xuejun Zhou Jun Gao

作者单位: Electronic Engineering College,Naval University of Engineering Wuhan,China

会议类型: 国际会议

会议名称: 2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)

会议地点: 北京

会议语种:英文

页码: 3979-3984

在线出版日期: 2009-08-16（万方平台首次上网日期，不代表论文的发表时间）