SARG04 decoy-state quantum key distribution based on an unstable source  

作　　者：周媛媛 周学军 

机构地区：[1]Electronic Engineering College,Naval University of Engineering

出　　处：《Optoelectronics Letters》2011年第5期389-393,共5页光电子快报（英文版）

基　　金：supported by the National High Technology Research and Development Program of China(No.2009AAJ128)

摘　　要：A three-state protocol for the SARG04 decoy-state quantum key distribution(QKD)based on an unstable source is presented. The lower bound to the secure key generation rate is derived without using the basic hypothesis of the original decoy-state idea.The three-state SARG04 decoy-state protocol with an unstable parametric down-conversion source is considered in the simulation.The simulation results show that the protocol in this paper with an unstable source gives a key generation rate that is close to that with a stable source,and only slight advantage appears by using a stable source when the transmission distance is long.So the SARG04 decoy-state protocol with an unstable source still can obtain the unconditional security with a slightly shortened final key.

关 键 词：Network security Quantum chemistry Quantum theory 

分 类 号：TN918.1[电子电信—通信与信息系统]