Decoy State Quantum Key Distribution with Odd Coherent State  

作　　者：孙仕海 高明 戴宏毅 陈平形 李承祖 

机构地区：[1]Department of Physics, National University of Defense Technology, Changsha 410073

出　　处：《Chinese Physics Letters》2008年第7期2358-2361,共4页中国物理快报（英文版）

摘　　要：We propose a decoy state quantum key distribution scheme with odd coherent state which follows sub-Poissonian distributed photon count and has low probability of the multi-photon event and vacuum event in each pulse. The numerical calculations show that our scheme can improve efficiently the key generation rate and secure communication distance. Fhrthermore, only one decoy state is necessary to approach to the perfect asymptotic limit with infinite decoy states in our scheme, but at least two decoy states are needed in other scheme.We propose a decoy state quantum key distribution scheme with odd coherent state which follows sub-Poissonian distributed photon count and has low probability of the multi-photon event and vacuum event in each pulse. The numerical calculations show that our scheme can improve efficiently the key generation rate and secure communication distance. Fhrthermore, only one decoy state is necessary to approach to the perfect asymptotic limit with infinite decoy states in our scheme, but at least two decoy states are needed in other scheme.

关 键 词：CRYPTOGRAPHY 

分 类 号：O413[理学—理论物理]