Title :
Single-photon interference experiment over 100 km for quantum cryptography system using balanced gated-mode photon detector
Author :
Kosaka, H. ; Tomita, A. ; Nambu, Y. ; Kimura, T. ; Nakamura, K.
Author_Institution :
Fundamental Res. Labs., NEC, Tsukuba, Japan
Abstract :
The authors demonstrate single-photon interference over 100 km using a balanced gated-mode photon detector and a plug and 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.
Keywords :
avalanche photodiodes; error statistics; light interferometry; optical fibre communication; quantum cryptography; 100 km; QBER; balanced gated-mode photon detector; plug/play system; quantum bit error rate; quantum cryptography; quantum key distribution; security criteria; single-photon interference experiment;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20030791
