Faithful quantum secure direct communication protocol against collective noise

An improved quantum secure direct communication （QSDC） protocol is proposed in this paper. Blocks of entangled photon pairs are transmitted in two steps in which secret messages are transmitted directly. The single logical qubits and unitary operations under decoherence free subspaces are presented...

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Bibliographic Details
Published inChinese physics B Vol. 19; no. 11; pp. 78 - 83
Main Author 杨静 王川 张茹
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.11.2010
Subjects
Bell态
秘密信息
纠缠光子对
通信协议
量子安全直接通信
量子比特
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ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/19/11/110306

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Summary:An improved quantum secure direct communication （QSDC） protocol is proposed in this paper. Blocks of entangled photon pairs are transmitted in two steps in which secret messages are transmitted directly. The single logical qubits and unitary operations under decoherence free subspaces are presented and the generalized Bell states are constructed which are immune to the collective noise. Two steps of qubit transmission are used in this protocol to guarantee the security of communication. The security of the protocol against various attacks are discussed.
Bibliography:TP333.4
quantum secure direct communication, collective noise
11-5639/O4
TN918.1
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/19/11/110306