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Science China Information Sciences

The influence of stochastic dispersion on quantum key distribution system

Wei Jin, Liming Zheng, FaQiang Wang, Ruisheng Liang

Published Apr 20, 2012• 7 citations
Publisher
DOI
10.1007/s11432-012-4586-7

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In this paper we investigate the chromatic dispersion impact on the quantum key distribution system based on multi-mode weak coherent phase-coded states. We provide an asymptotic secure key rate estimation, taking into account error detection probability due to chromatic dispersion. We demonstrate numerically and experimentally that the effect of chromatic dispersion in an optical fiber without any compensation hinders the secret key distribution at a distance more than 53 km. Finally, we propose a modification to the considered quantum communication system in order to mitigate the influence of chromatic dispersion on its performance.