Continuous operation of high bit rate quantum key distribution

Abstract

We demonstrate a quantum key distribution with a secure bit rate exceeding 1 Mbit/s over 50 km fiber averaged over a continuous 36-hours period. Continuous operation of high bit rates is achieved using feedback systems to control path length difference and polarization in the interferometer and the timing of the detection windows. High bit rates and continuous operation allows finite key size effects to be strongly reduced, achieving a key extraction efficiency of 96% compared to keys of infinite lengths.

four pages, four figures

References in corpus (4)

• Gigahertz decoy quantum key distribution with 1 Mbit/s secure key rate
• High speed single photon detection in the near-infrared
• Composability in quantum cryptography
• Practical long-distance quantum key distribution system using decoy levels

Cited by in corpus (3)

• A Quantum Pulse Gate based on Spectrally Engineered Sum Frequency Generation
• Quantum Eavesdropping without Interception: An Attack Exploiting the Dead Time of Single Photon Detectors
• Resilience of gated avalanche photodiodes against bright illumination attacks in quantum cryptography