Abstract
In a quantum secure direct communication protocol, two remote parties can transmit the secret message directly without first generating a key to encrypt them. A quantum secure direct communication protocol using two-photon four-qubit cluster states is presented. The presented scheme can achieve a higher efficiency in transmission and source capacity compared with the proposed quantum secure direct communication protocols with cluster states, and the security of the protocol is also discussed.
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Acknowledgements
We would like to thank the anonymous referees for their valuable and constructive comments. This work is in part supported by the Key Project of NSFC-Guangdong Funds (No. U0935002).
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Sun, ZW., Du, RG. & Long, DY. Quantum Secure Direct Communication with Two-Photon Four-Qubit Cluster States. Int J Theor Phys 51, 1946–1952 (2012). https://doi.org/10.1007/s10773-011-1072-8
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DOI: https://doi.org/10.1007/s10773-011-1072-8