Continuous operation of high bit rate quantum key distribution

Details Continuous operation of high bit rate quantum key distribution Continuous operation of high bit rate quantum key distribution

2010-05-25

arxiv.org/abs/1005.4573v1

Applied Physics Letters 96, 161102 (2010)

Physics

Quantum Physics

four pages, four figures

Scientific paper

10.1063/1.3385293

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.

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