New decoy state quantum key distribution for increasing the security communication distance

被引：0
|
作者：
Liu D. [1 ]
Pei C.-X. [1 ]
Quan D.-X. [1 ]
Han B.-B. [1 ]
Zhao N. [1 ]
机构：
[1] State Key Lab. of Integrated Service Networks, Xidian Univ.
来源：
Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University | 2010年 / 37卷 / 01期
关键词：
Decoy state; Modified coherent state; Quantum communication; Quantum key distribution;
D O I：
10.3969/j.issn.1001-2400.2010.01.003
中图分类号：
学科分类号：
摘要：
To increase the security distance of quantum communication, a new scheme of decoy state quantum key distribution with a modified coherent state is proposed. The probability of multi-photon pulse in weak coherent source can be decreased by canceling two photon pulses to improve the security distance. Based on the math model of the decoy state QKD, the formula for the yield and error rate of the single photon pulse with the Modified Coherent State is deduced, and substituted in GLLP to calculate the generation rate of quantum keys. Results show that the decoy state with the Modified Coherent State can increase the secure communication distance about 10%, which is very close to that of the perfect decoy state QKD.
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页码：13 / 17
页数：4
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