Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 16, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3385293
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We demonstrate a quantum key distribution with a secure bit rate exceeding 1 Mbit/s over 50 km fiber averaged over a continuous 36 h 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. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3385293]
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