Faithful quantum secure direct communication protocol against collective noise

Faithful quantum secure direct communication protocol against collective noise
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针对集体噪声的忠实量子安全直接通信协议

DOI:
10.1088/1674-1056/19/11/110306
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发表时间:
2010-11
期刊:
影响因子:
1.7
通讯作者:
Zhang Ru
Zhang Ru
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Yang Jing;Wang Chuan;Zhang Ru

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提出了一种改进的量子安全直接通信协议。纠缠光子对的块在两个步骤中被传输,其中秘密消息被直接传输。给出了消相干自由子空间下的单逻辑量子比特和么正运算,构造了对集体噪声免疫的广义Bell态。该协议采用两步量子比特传输,保证了通信的安全性。讨论了该协议抵抗各种攻击的安全性。
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.
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