Abstract
We present a novel scheme for deterministic secure quantum communication by using three-qubit Greenberger-Horne-Zeilinger (GHZ) state as quantum channel. It will be shown that secret messages can be encoded by employing four two-unitary collective operations, and decoded by Bell-basis measurements and some additional classical information. Security of the communication can be ensured by the order rearrangement of photon pairs techniques and the decoy photon checking technique. It has a high capacity as each GHZ state can carry two bits of information, and has a high intrinsic efficiency because almost all the instances except for the decoy checking photons (its number is negligible) are useful. Furthermore, this protocol is feasible with the present-day technique.
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This work is supported by the Talent Project of the West AnHui University for Outstanding Youth under Grant No. 0044113017, the National Undergraduate Innovation and Entrepreneurship Training Program Project under Grant No. 201210376008, the research project of Lu’an city under Grant No. 2013LWB004, the Key Project of Natural Science Fund in Anhui Provincen under Grant No. KJ2013A261, the National Natural Science Foundation of China under Grant No. 61375121.
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Yuan, H., Zhang, Q., Hong, L. et al. Scheme for Deterministic Secure Quantum Communication with Three-qubit GHZ State. Int J Theor Phys 53, 2558–2564 (2014). https://doi.org/10.1007/s10773-014-2053-5
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DOI: https://doi.org/10.1007/s10773-014-2053-5