Optimum parameters for biased two-state quantum key distribution protocol
非对称二状态量子密钥分配协议最优参量研究

By analyzing the efficiency and security of B92 quantum key distribution (QKD) protocol,we concluded that efficiency can be greatly improved using biased state source without loss of security.We studied the constraint relations between parameters and performance of the biased B92 schem.The optimum parameters for a variety of scenarios were presented.Meanwhile,the efficiency and security for these scenarios were compared with each other in detail.In conclusion,we have obtained a globally optimal biased B92 QKD scheme whose performance outgo the standard B92.