Decoy-state quantum key distribution with practical light source

被引：10
|
作者：
Jiao Rong-Zhen [1 ]
Zhang Chao [1 ]
Ma Hai-Qiang [1 ]
机构：
[1] Beijing Univ Posts & Telecommun, Sch Sci, Beijing 100876, Peoples R China
来源：
ACTA PHYSICA SINICA | 2011年 / 60卷 / 11期
关键词：
decoy state; quantum key distribution; statistical fluctuation;
D O I：
10.7498/aps.60.110303
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The performance of active decoy-state quantum key distribution (QKD) system with a practical light source is compared with that of passive decoy-state QKD. The effect of statistical fluctuation due to a finite data size on final secret key rate is analyzed. This procedure is based on the standard error analysis on the assumption that all the variables measured in the experiment fluctuate around their asymptotic values. The relation between key generation rate and secure transmission distance is shown with exchanged quantum efficiency of threshold detector (eta(d) = 1 and eta(d) = 0.4) under the condition of active decoy-state (or passive decoy-state) QKD which we pick the data size to be N = 6.0 x 10(9). This analysis will provide important parameters for practical QKD experiment.
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页数：4
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