Practical decoy-state method in quantum key distribution with a heralded single-photon source

被引：98
|
作者：
Wang, Qin [1 ]
Wang, Xiang-Bin
Guo, Guang-Can
机构：
[1] Univ Sci & Technol China, Dept Phys, Key Lab Quantum Informat, Hefei 230026, Peoples R China
[2] Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
来源：
PHYSICAL REVIEW A | 2007年 / 75卷 / 01期
关键词：
D O I：
10.1103/PhysRevA.75.012312
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose a practical decoy-state method with heralded single-photon source for quantum key distribution (QKD). In the protocol, three intensities are used and one can estimate the fraction of single-photon counts. The final key rate over transmission distance is simulated under various parameter sets. Due to the lower dark count than that of a coherent state, it is shown that a three-intensity decoy-state QKD with a heralded source can work for a longer distance than that of a coherent state.
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页数：5
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