摘要
测量了光脉冲在不同传输距离和不同外界环境影响下基于差分相位编码和双不等臂M-Z相位编码系统的时间抖动,并根据时间抖动的分布情况建立了相位编码量子密钥分发系统中误码率和时间抖动关系的物理模型,给出了单光子脉冲一般波形函数和误码率之间的关系式,根据这个关系式可以得出确定波形单光子脉冲在确定时间抖动分布情况下系统误码率的结果.
Optical pulse will reach the receiver not at exact time instance due to the transmission through the long trunk fiber, and this phenomenon will effect on the bits error rate in the Quantum key distribution （QKD） system to some extend. The time jitter based on the differential phase shift quantum key distribution system and two asymmetric Mach-Zehnder interferometers is measured outdoors in different transmission distance and the physical model of the relationship between the time jitter and the quantum bit error rate is proposed. According to this relationship,the quantum bit error rate can be estimated for some optical pulse shape and some statistical distribution function.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第8期5514-5522,共9页
Acta Physica Sinica
基金
广州市科技支撑计划(批准号:2008Z1-D501)
广东省工业攻关项目(批准号:2007B010400009)
广东理工职业学院科研项目(批准号:0901)资助的课题~~
关键词
量子密钥分发
相位编码
时间抖动
误码率
quantum key distribution
phase-encoding
time jitter
quantum bit error rate
