Field test of a continuous-variable quantum key distribution prototype

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dc.creatorFossier, Simon
dc.creatorDiamanti, Eleni
dc.creatorDebuisschert, Thierry
dc.creatorVilling, André
dc.creatorTualle-Brouri, Rosa
dc.creatorGrangier, Philippe
dc.date2008-12-17
dc.date.accessioned2026-07-07T13:14:47Z
dc.date.available2026-07-07T13:14:47Z
dc.descriptionWe have designed and realized a prototype that implements a continuous-variable quantum key distribution protocol based on coherent states and reverse reconciliation. The system uses time and polarization multiplexing for optimal transmission and detection of the signal and phase reference, and employs sophisticated error-correction codes for reconciliation. The security of the system is guaranteed against general coherent eavesdropping attacks. The performance of the prototype was tested over preinstalled optical fibres as part of a quantum cryptography network combining different quantum key distribution technologies. The stable and automatic operation of the prototype over 57 hours yielded an average secret key distribution rate of 8 kbit/s over a 3 dB loss optical fibre, including the key extraction process and all quantum and classical communication. This system is therefore ideal for securing communications in metropolitan size networks with high speed requirements.
dc.description15 pages, 6 figures, submitted to New Journal of Physics (Special issue on Quantum Cryptography)
dc.identifierhttps://arxiv.org/abs/0812.3292
dc.identifierhttp://arxiv.org/abs/0812.3292
dc.identifierNew J. Phys. 11, 045023 (2009)
dc.identifierdoi:10.1088/1367-2630/11/4/045023
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/230288
dc.subjectQuantum Physics
dc.titleField test of a continuous-variable quantum key distribution prototype
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