%0 Journal Article
%T Analysis of decoy state quantum-key-distribution system<br>基于伪态协议的量子密钥分配系统研究
%A Jiao Rong-Zhen
%A Zhang Wen-Han
%A <br>焦荣珍
%A 张文翰
%J 物理学报
%D 2009
%I 
%X The security of quantum-key-distribution system is analyzed using the decoy state protocol with two weak decoy states and one signal state. The comparison is based on the key generation rate as a function of distance for two types of decoy states: the vacuum and a weak decoy state, asymptotically approaching the theoretical limit of the most general type of decoy protocol, one-decoy-state protocol. We studied the two-decoy-state protocol in connection with the intensity of signal state, and the gain of signal states, the overall quantum bit error rate, the gain of single-photon states and the error rate of single-photon states and arrived at the optimal condition which maximizes the key generation rate.
%K 伪态协议，
%K 量子密钥生成率，
%K 量子比特误码率
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=36742E552286CF7C9E74A1EBA4CE6FDC&yid=DE12191FBD62783C&vid=9FFCC7AF50CAEBF7&iid=E158A972A605785F&sid=4B5EFEE8F5D7C671&eid=E4F478FAB2F30367&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=0