摘要
根据量子密钥分发协议的原理和单光子探测器的工作模式系统分析了单光子探测器性能对量子密钥分发系统影响的物理模型,给出了单光子探测器暗计数和量子效率对系统筛选码率和量子误码率等指标产生影响的计算公式,并通过对各类量子密钥分发系统的比较,推导出了适用于一般量子密钥分发系统的普适结果。结果表明,在同等条件下采用较少的探测时间门可以提高量子密钥分发系统的性能。
The physical model for the influence of single photon detector on the performance of quantum key distribution （QKD） system is analyzed according to the principle of QKD system and the operation mode of single photon detector. The rela- tionship between the parameters of the single photon detector and the performance of the QKD system is also given. Various kinds of QKD systems are compared to derive a universal formula, which can describe the influence of single photon detector on any QKD scheme. The result shows that less time-slots of the single photon detector in the scheme may help to improve the performance of the QKD system.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2010年第7期1661-1664,共4页
High Power Laser and Particle Beams
基金
广东省工业攻关项目(2007B010400009)
广州市科技支撑计划项目(2008Z1-D501)
广东理工职业学院科研资助课题(0901)
关键词
量子密钥分发
单光子探测技术
暗计数
筛选码率
量子误码率
quantum key distribution
single photon detection technology
dark count
sifted rate
quantum bit error rate
