Low Timing Jitter Detector for Gigahertz Quantum Key Distribution

Details Low Timing Jitter Detector for Gigahertz Quantum Key Distribution Low Timing Jitter Detector for Gigahertz Quantum Key Distribution

2007-02-23

arxiv.org/abs/quant-ph/0702216v1

Electronics Letters, 43 (3), pp 180-182 (2007)

Physics

Quantum Physics

11 pages, including 2 figures

Scientific paper

A superconducting single-photon detector based on a niobium nitride nanowire is demonstrated in an optical-fibre-based quantum key distribution test bed operating at a clock rate of 3.3 GHz and a transmission wavelength of 850 nm. The low jitter of the detector leads to significant reduction in the estimated quantum bit error rate and a resultant improvement in the secrecy efficiency compared to previous estimates made by use of silicon single-photon avalanche detectors.

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