Abstract
Based on the properties of two-qubit Grover’s quantum search algorithm, we propose two quantum direct communication protocols, including a deterministic secure quantum communication and a quantum secure direct communication protocol. Secret messages can be directly sent from the sender to the receiver by using two-qubit unitary operations and the single photon measurement with one of the proposed protocols. Theoretical analysis shows that the security of the proposed protocols can be highly ensured.
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Acknowledgments
This work is supported by NSFC (Nos. 61272514, 61303199, 61411146001, 61170272, 61121061), the Shandong Provincial Natural Science Foundation, China (Nos. ZR2013FM025, ZR2013FQ001, ZR2014FM003), the Shandong Province Outstanding Research Award Fund for Young Scientists of China (No. BS2013DX010, BS2014DX007), NCET (No. NCET-13-0681), the Fok Ying Tong Education Foundation (No. 131067), the National Development Foundation for Cryptological Research (MMJJ201401012) and Shandong Academy of Sciences Youth Fund Project(2013QN007).
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Xu, SJ., Chen, XB., Wang, LH. et al. Two Quantum Direct Communication Protocols Based on Quantum Search Algorithm. Int J Theor Phys 54, 2436–2445 (2015). https://doi.org/10.1007/s10773-014-2466-1
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DOI: https://doi.org/10.1007/s10773-014-2466-1