摘要
提出了一种用于自由空间的量子通信实验系统.该系统由两个子系统组成,分别使用衰减激光作为单光子源和纠缠光子对作为光源,可以分别研究单光子脉冲系统与纠缠光子对系统的大气传输特性,并进行了两种自由空间量子通信方式的性能对比分析.结果表明,低层大气对量子通信的影响较大,单光子脉冲系统的量子密钥传输率较高.
An experimental system of quantum communication that operated for free space is presented. This system is composed of two subsystems, which use attenuated laser or entangled photon pairs as the photon source, respectively. It can be used for experimental investigation in atmospheric characteristics of the system using a single photon source or entangled photon pairs, respectively, along with a comparison of characteristics between the two systems. The results show that the atmosphere in the lower layer plays an important role in affecting the quantum communication, and that the efficiency of the quantum key distribution is higher in the system using a single photon source.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2007年第5期708-711,727,共5页
Journal of Xidian University
基金
国家自然科学基金资助项目(60132030
605721147)
关键词
量子通信
通信实验系统
大气效应
量子仿真
quantum communication
communication experimental system
atmospheric effect
quantum simulation