Field experiment on a robust hierarchical metropolitan quantum cryptography network

  title={Field experiment on a robust hierarchical metropolitan quantum cryptography network},
  author={Fang-Xing Xu and Wei Chen and Shuang Wang and Zhen-Qiang Yin and Yang Zhang and Yun Liu and Zheng-Wei Zhou and Yibo Zhao and Hongwei Li and Dong Liu and Zhengfu Han and Guangcan Guo},
  journal={Chinese Science Bulletin},
A hierarchical metropolitan quantum cryptography network upon the inner-city commercial telecom fiber cables is reported in this paper. The seven-user network contains a four-node backbone net with one node acting as the subnet gateway, a two-user subnet and a single-fiber access link, which is realized by the Faraday-Michelson interferometer set-ups. The techniques of the quantum router, optical switch and trusted relay are assembled here to guarantee the feasibility and expandability of the… 


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