Experimental quantum key distribution with decoy states.

  title={Experimental quantum key distribution with decoy states.},
  author={Yi Zhao and Bing Qi and Xiongfeng Ma and Hoi-Kwong Lo and Li Qian},
  journal={Physical review letters},
  volume={96 7},
  • Yi ZhaoB. Qi L. Qian
  • Published 24 March 2005
  • Computer Science, Physics
  • Physical review letters
To increase dramatically the distance and the secure key generation rate of quantum key distribution (QKD), the idea of quantum decoys--signals of different intensities--has recently been proposed. Here, we present the first experimental implementation of decoy state QKD. By making simple modifications to a commercial quantum key distribution system, we show that a secure key generation rate of 165 bit/s, which is 1/4 of the theoretical limit, can be obtained over 15 km of a telecommunication… 

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