Secure Quantum Key Distribution over 421 km of Optical Fiber

Secure Quantum Key Distribution over 421 km of Optical Fiber

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 k...

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Veröffentlicht in:Physical review letters 2018-11, Vol.121 (19), p.190502-190502, Article 190502
Hauptverfasser: Boaron, Alberto, Boso, Gianluca, Rusca, Davide, Vulliez, Cédric, Autebert, Claire, Caloz, Misael, Perrenoud, Matthieu, Gras, Gaëtan, Bussières, Félix, Li, Ming-Jun, Nolan, Daniel, Martin, Anthony, Zbinden, Hugo
Format: Artikel
Sprache:eng
Schlagworte:
Optical fibers
Quantum cryptography
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Zusammenfassung: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.121.190502