• 研究论文 • 上一篇    下一篇



  1. (1. 西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安 710071;2. 烟台大学 物理系,山东 烟台 264005)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-10-20 发布日期:2007-10-25

Study of quantum communication systems used for free space

YAN Yi1,2;PEI Chang-xing1;SHI Rui-juan1;HAN Bao-bin1;ZHANG Lei1

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi′an 710071, China;2. Dept. of Physics, Yantai Univ., Yantai 264005, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-10-20 Published:2007-10-25

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.

关键词: 量子通信, 通信实验系统, 大气效应, 量子仿真

Abstract: 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.

Key words: quantum communication, communication experimental system, atmospheric effect, quantum simulation


  • TP301