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We present a quantum key distribution system with a 2.5 GHz repetition rate using a three-state time-bin protocol combined with a one-decoy approach. Taking advantage of superconducting single-photon detectors optimized for quantum key distribution and ultralow-loss fiber, we can distribute secret keys at a maximum distance of 421 km and obtain secret key rates of 6.5 bps over 405 km.
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Alberto Boaron
University of Geneva
Gianluca Boso
University of Geneva
Davide Rusca
Universidade de Vigo
Physical Review Letters
University of Geneva
Corning (United States)
ID Quantique (Switzerland)
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Boaron et al. (Mon,) studied this question.
synapsesocial.com/papers/69d7bed005ee2ba81dbed9f6 — DOI: https://doi.org/10.1103/physrevlett.121.190502
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