Faithful quantum secure direct communication protocol against collective noise

doi:10.1088/1674-1056/19/11/110306

中国物理B ›› 2010, Vol. 19 ›› Issue (11): 110306-110311.doi: 10.1088/1674-1056/19/11/110306

Faithful quantum secure direct communication protocol against collective noise

杨静¹, 张茹¹, 王川²

(1)School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; (2)School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; Key Laboratory for Atomic and Molecular Nanosciences and Department of Physics, Tsinghua University,Beijing 100084, China

收稿日期:2010-04-13 修回日期:2010-05-11 出版日期:2010-11-15 发布日期:2010-11-15
基金资助:
Project supported by the National Fundamental Research Program (Grant No. 2010CB923202), the Fundamental Research Funds for the Central Universities (Grant No. BUPT2009RC0710), the National Natural Science Foundation of China (Grant Nos. 60937003 and 10947151).

Faithful quantum secure direct communication protocol against collective noise

Yang Jing(杨静)^a), Wang Chuan(王川)^a)b)†ger, and Zhang Ru(张茹)^a)

^a School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China; ^b Key Laboratory for Atomic and Molecular Nanosciences and Department of Physics, Tsinghua University, Beijing 100084, China

Received:2010-04-13 Revised:2010-05-11 Online:2010-11-15 Published:2010-11-15
Supported by:
Project supported by the National Fundamental Research Program (Grant No. 2010CB923202), the Fundamental Research Funds for the Central Universities (Grant No. BUPT2009RC0710), the National Natural Science Foundation of China (Grant Nos. 60937003 and 10947151).

摘要/Abstract

摘要： 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.

Abstract: 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.

Key words: quantum secure direct communication, collective noise

中图分类号: (Entanglement and quantum nonlocality)

03.65.Ud

03.67.Dd (Quantum cryptography and communication security) 03.67.Hk (Quantum communication)

杨静, 王川, 张茹. Faithful quantum secure direct communication protocol against collective noise[J]. 中国物理B, 2010, 19(11): 110306-110311.

Yang Jing(杨静), Wang Chuan(王川), and Zhang Ru(张茹). Faithful quantum secure direct communication protocol against collective noise[J]. Chin. Phys. B, 2010, 19(11): 110306-110311.

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Faithful quantum secure direct communication protocol against collective noise

Faithful quantum secure direct communication protocol against collective noise

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