Improvement on Quantum Secure Direct Communication with W State in Noisy Channel

作     者：DONG Li XIU Xiao-Ming GAO Ya-Jun CHI Feng 

作者机构：Department of Physics Bohai University Jinzhou 121000 China 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2009年第51卷第2期

页      面：232-234页

核心收录：

学科分类：0810[工学-信息与通信工程] 07[理学] 08[工学] 070201[理学-理论物理] 081001[工学-通信与信息系统] 0702[理学-物理学] 

基　　金：supported by National Natural Science Foundation of China under Grant No.10704011 the Research Programs of the Educational Office of Liaoning Province of China under Grant No.2008006 

主　　题：quantum cryptography quantum secure direct communication W state 

摘      要：An improvement （Y-protocol） [Commun. Theor. Phys. 49 （2008） 103] on the quantum secure direct communication with W state （C-protocol） [Chin. Phys. Lett. 23 （2006） 290] is proposed by Yuan et al. The quantum bit error rate induced by eavesdropper is 4.17% in C-protocol and 6.25% in Y-protocoL In this paper, another improvement on C-protocol is given. The quantum bit error rate of the eavesdropping will increase to 8.75%, which is 1.1 times larger than that in C-protocol and 0.4 times larger than that in Y-protocol.