Quantum communication has established itself as a reliable and effective method of ensuring absolute confidentiality by exploiting quantum properties. We reached a significant milestone with the launch of the first quantum network connecting three European countries during the G20 meeting in Trieste. A reliable quantum key distribution (QKD) link using an undersea fibre-optic cable between the islands of Malta and Sicily was successfully implemented using an innovative room-temperature single-photon detector that outperformed standard detectors. We also implemented QKD in two terrestrial free-space links in the Florence area, demonstrating that time-bin, fibre-based QKD systems can be efficiently used for free-space communications links.
Advancements in deployed quantum communication networks / Ribezzo, D., Marconi, C., Bianchi, L., Guarda, G., Cocchi, S., Pinel, M., Occhipinti, T., Bacco, D., Zavatta, A.. - ELETTRONICO. - (2025), pp. 0-0. (Quantum West, 2025 ) [10.1117/12.3053673].
Advancements in deployed quantum communication networks
Ribezzo, Domenico;Guarda, Giulia;Cocchi, Sebastiano;Bacco, Davide;
2025
Abstract
Quantum communication has established itself as a reliable and effective method of ensuring absolute confidentiality by exploiting quantum properties. We reached a significant milestone with the launch of the first quantum network connecting three European countries during the G20 meeting in Trieste. A reliable quantum key distribution (QKD) link using an undersea fibre-optic cable between the islands of Malta and Sicily was successfully implemented using an innovative room-temperature single-photon detector that outperformed standard detectors. We also implemented QKD in two terrestrial free-space links in the Florence area, demonstrating that time-bin, fibre-based QKD systems can be efficiently used for free-space communications links.
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