2003/06/10 by Hideo Kosaka, Akihisa Tomita, Yoshihiro Nambu +2
Physics and Astronomy · #quant-ph
published as Electron. Lett., vol. 39, No. 16, pp. 1199-1201(2003). · Submitted to Electronics Letters on May 16, 2003
arxiv created 2003/06/10 · arxiv updated 2009/12/01
We demonstrate single-photon interference over 100 km using a balanced gated-mode photon detector and a plug & play system for quantum key distribution. The visibility with 0.1 photon/pulse was more than 80% after 100 km transmission. This corresponds to the fidelity of a quantum cryptography system of more than 90% and a QBER of less than 10%, satisfying the security criteria.