Field trial of a three-state quantum key distribution scheme in the Florence metropolitan area

Year: 2019

Authors: Bacco D., Vagniluca I., Da Lio B., Biagi N., Della Frera A., Calonico D., Toninelli C., Cataliotti F.S., Bellini M., Oxenløwe L.K., Zavatta A.

Autors Affiliation: Tech Univ Denmark, Dept Photon Engn, DTU Fotonik, CoE SPOC, Lyngby, Denmark; Univ Napoli Federico II, Naples, Italy; CNR, INO, Florence, Italy; Micro Photon Devices Srl, Bolzano, Italy; Ist Nazl Ric Metrol, Turin, Italy; Univ Firenze, LENS, Florence, Italy.

Abstract: In-field demonstrations in real-world scenarios boost the development of a rising technology towards its integration in existing infrastructures. Although quantum key distribution (QKD) devices are already adopted outside the laboratories, current field implementations still suffer from high costs and low performances, preventing this emerging technology from a large-scale deployment in telecommunication networks. Here we present a simple, practical and efficient QKD scheme with finite-key analysis, performed over a 21 dB-losses fiber link installed in the metropolitan area of Florence (Italy). Coexistence of quantum and weak classical communication is also demonstrated by transmitting an optical synchronization signal through the same fiber link.

Journal/Review: EPJ QUANTUM TECHNOLOGY

Volume: 6 (1)      Pages from: 5-1  to: 5-8

More Information: This work is supported by the Center of Excellence, SPOC-Silicon Photonics for Optical Communications (ref DNRF123), by the People Programme (Marie Curie Actions) of the European Union´s Seventh Framework Programme (FP7/2007-2013) under REA grant agreement no 609405 (COFUNDPostdocDTU). This research was sponsored by the NATO Science for Peace and Security program under grant G5485.
KeyWords: Quantum key distribution, quantum communications
DOI: 10.1140/epjqt/s40507-019-0075-x

Citations: 38
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