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

Abstract

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.

11 pages, 5 figures, submitted to Phys. Rev. A

References in corpus (1)

• Continuous-variable quantum cryptography is secure against non-gaussian attacks

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• Topological optimization of quantum key distribution networks
• Multipartite Continuous Variable Solution for the Byzantine Agreement Problem
• Information-theoretically Secret Key Generation for Fading Wireless Channels