Arbitrarily long distance quantum communication using inspection and power insertion  

作　　者：WANG WanYing1,2,WANG Chuan1,2,ZHANG GuangYu1,3 & LONG GuiLu1,2 1 Department of Physics,Tsinghua University,Beijing 100084,China 2 Tsinghua National Laboratory for Information Science and Technology,Tsinghua University,Beijing 100084,China 3 College of Applied Science,Harbin University of Science and Technology,Harbin 150080,China 

出　　处：《Chinese Science Bulletin》2009年第1期158-162,共5页

基　　金：Supported by the National Basic Research Program of China (Grant No.2006CB921106);National Natural Science Foundation of China (Grant No.10325521);Key Project of Ministry of Education of China (Grant No.306020)

摘　　要：The biggest obstacle for long distance quantum communication is the channel loss and the channel noise on photons. In this paper,a method to solve this problem was analyzed using inspection and power insertion (IPI). It is proved that quantum communication may be established over arbitrarily long distance using this technology. The amount of resources required is a polynomial function of the dis-tance. IPI is proposed as a general technique to prolong quantum secure direct communication where secret messages are transmitted directly over a quantum channel.The biggest obstacle for long distance quantum communication is the channel loss and the channel noise on photons. In this paper, a method to solve this problem was analyzed using inspection and power insertion （IPI）. It is proved that quantum communication may be established over arbitrarily long distance using this technology. The amount of resources required is a polynomial function of the distance. IPI is proposed as a general technique to prolong quantum secure direct communication where secret messages are transmitted directly over a quantum channel.

关 键 词：长距离量子通信 量子安全通信 量子密匙分布 噪声 

分 类 号：O413[理学—理论物理] TN914[理学—物理]