Fault tolerant two-step quantum secure direct communication protocol against collective noises

查看全文 作　　者：TSAI [1]ChiaWei;HWANG [1]Tzonelih

机构地区：[1]Department of Computer Science and Information Engineering, National Cheng Kung University

出　　处：《Science China(Physics,Mechanics & Astronomy)》索引2011年第54卷第3期,共6页

基　　金：supported by the National Science Council, Taiwan, China (Grant No. NSC98-2221-E-006-097-MY3) 摘　　要：This work proposes two fault tolerant quantum secure direct communication (QSDC) protocols which are robust against two kinds of collective noises: the collective-dephasing noises and the collective-rotation noises, respectively. The two QSDC protocols are constructed from four-qubit DF states which consist of two logical qubits. The receiver simply performs two Bell state measurements (rather than four-qubit joint measurements) to obtain the secret message. The protocols have qubit effciency twice that of the other corresponding fault tolerant QSDC protocols. Furthermore, the proposed protocols are free from Trojan horse attacks. 关键词：量子安全直接通信通信协议集体容错声音联合测量量子比特旋转噪声

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Fault tolerant two-step quantum secure direct communication protocol against collective noises

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