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Quantum Secure Direct Communication Based on Four-Qubit Cluster States

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Abstract

A novel quantum secure direct communication scheme based on four-qubit cluster states is proposed. In this scheme, the quantum channel between the sender Alice and the receiver Bob consists of an ordered sequence of cluster states which are prepared by Alice. After ensuring the security of quantum channel, Alice prepares the encoded Bell-state sequence, and performs Bell-basis measurements on the qubits at hand. Then Alice tells the measured results to Bob, and Bob also performs Bell-basis measurements on his own qubits. Finally Bob can get the secret information through the analysis of their measured results. In our scheme, the qubits carrying the secret message do not need to be transmitted in public channel. We show this scheme is determinate and secure.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China; the Natural Science Foundation of Jiangxi Province, China; the Research Foundation of state key laboratory of advanced optical communication systems and networks, Shanghai Jiao Tong University, China, and the Research Foundation of the Education Department of Jiangxi Province.

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Authors and Affiliations

  1. Department of Physics, Jiangxi Normal University, Nanchang, 330022, China

    Qin-nan Zhang, Cui-cui Li, Yuan-hua Li & Yi-you Nie

  2. Key Laboratory of Optoelectronic & Telecommunication of Jiangxi Province, Nanchang, 330022, China

    Yuan-hua Li & Yi-you Nie

  3. State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, 200240, China

    Yi-you Nie

Authors
  1. Qin-nan Zhang
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  2. Cui-cui Li
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  3. Yuan-hua Li
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  4. Yi-you Nie
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Correspondence to Yi-you Nie.

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Zhang, Qn., Li, Cc., Li, Yh. et al. Quantum Secure Direct Communication Based on Four-Qubit Cluster States. Int J Theor Phys 52, 22–27 (2013). https://doi.org/10.1007/s10773-012-1294-4

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  • DOI: https://doi.org/10.1007/s10773-012-1294-4

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