Single-photon interference over 150-km transmission using silica-based integrated-optic interferometers for quantum cryptography

Details Single-photon interference over 150-km transmission using silica-based integrated-optic interferometers for quantum cryptography Single-photon interference over 150-km transmission using silica-based integrated-optic interferometers for quantum cryptography

2004-03-15

arxiv.org/abs/quant-ph/0403104v2

Jpn. J. Appl. Phys. Vol.43 (2004) No.9AB pp.L1217 - L1219

Physics

Quantum Physics

10 pages, 2 figures, submitted to Electronics Letters

Scientific paper

10.1143/JJAP.43.L1217

We have demonstrated single-photon interference over 150 km using
time-division interferometers for quantum cryptography, which were composed of
two integrated-optic asymmetric Mach-Zehnder interferometers, and balanced
gated-mode photon detectors. The observed fringe visibility was more than 80%
after 150-km transmission.

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