Scintillation discriminator improves free-space quantum key distribution
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摘要:
We present an analysis of the impact of afluctuating-loss channel on free-space quantum key distribution (QKD).Considering the characteristics of the fluctuating-loss channel,a scintillation discriminator that acts according to the information of instant channel loss is proposed to help improve the performance of a free-space QKD system,which suffers from the influence of atmospheric turbulence.Theoretical and numerical results show that this discriminator is a useful tool for increasing secure key rates,especially for long-range free-space QKD.