Practical method of sliced error correction protocol in CV-QKD

摘要

Sliced error correction is a scheme of CV-QKD post processing. Previous researches have focused on theoretically maximizing the net amount of information, i.e., mutual information between Alice and Bob. However, binary correction protocol(BCP) is not practically perfect. Therefore, we propose new criteria of dividing Alice's raw key space to lower error probabilities of slice bits. Consequently, the number of bits that can be practically used increases. Therefore, the net amount of information of our proposal is larger than that of previous method which theoretically maximizes the mutual information.