Quantum key distribution over 25 km with an all-fiber continuous-variable system

Date
Authors
Lodewyck, Jerome
Bloch, Matthieu
Garcia-Patron, Raul
Fossier, Simon
Karpov, Evgueni
Diamanti, Eleni
Debuisschert, Thierry
Cerf, Nicolas J.
Tualle-Brouri, Rosa
McLaughlin, Steven W.
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
We report on the implementation of a reverse-reconciliated coherent-state continuous-variable quantum key distribution system, with which we generated secret keys at a rate of more than 2 kb/s over 25 km of optical fiber. Time multiplexing is used to transmit both the signal and phase reference in the same optical fiber. Our system includes all experimental aspects required for a field implementation of a quantum key distribution setup. Real-time reverse reconciliation is achieved by using fast and efficient LDPC error correcting codes.
Comment: 11 pages, 5 figures, submitted to Phys. Rev. A
Keywords
Quantum Physics
Citation
Collections