Quantum secure direct communication protocol based on
mixture of GHZ particles and single photon

doi:10.3969/j.issn.1007-5461.2022.05.010

Abstract

Abstract: Based on the combination of GHZ particles and single photon, a quantum secure direct communication protocol is proposed. In this protocol, Alice encodes the information, and then divides all GHZ particles into three parts: S 1, S 2 and S 3. Firstly, Alice sends S 1 to Bob and detects the channel security. Secondly, mixes S 2 with single photon S S and sends to Bob and detects the channel security after rearranging and adding decoy particles in order. Thirdly, mixes S 3 with S S and repeats the previous operation. Finally, Bob measures the information and decodes it. This protocol can save the complex unitary operation, simplify the implementation process of the protocol, and at the same time, the combination of sequence rearrangement and decoy particles ensures the security of the protocol. In addition, the mixing of single photon and GHZ states makes it possible to load 4 bits classical information on a quantum state, which greatly increases the coding capacity and transmission eﬃciency.

Key words: quantum optics, GHZ state, quantum secure communication, transmission e?ciency

CLC Number:

TN918.1

ZHOU Xiantao, JIANG Yinghua ∗ , GUO Chenfei, ZHAO Ning, LIU Biao. Quantum secure direct communication protocol based on mixture of GHZ particles and single photon[J]. Chinese Journal of Quantum Electronics, 2022, 39(5): 768-775.

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Quantum secure direct communication protocol based on mixture of GHZ particles and single photon

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