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The performance of three-intensity decoy-state measurement-device-independent quantum key distribution

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Abstract

The performance of measurement-device-independent quantum key distribution (MDI-QKD) with three-intensity decoy-state is completely analyzed. The statistical fluctuation based on the central limit theorem is also considered both in symmetric and asymmetric cases. Our simulation results show that in the MDI-QKD system, the choice of the decoy state intensities is more important than the choice of the signal state. More significantly, the ratio between Alice’s signal state optimal intensities and decoy state is well approximately equal to Bob’s in the asymmetric case. These results can be used to optimize the practical quantum communication system.

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Acknowledgements

This work is supported by National Natural Science Foundation of China (Grant No. 61571060), Ministry of Science and Technology of China (Grant No. 2016YFA0301300) and Fundamental Research Funds for the Central Universities (Grant No. 2019XD-A02).

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Authors and Affiliations

  1. School of Science, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    Wentao Liang, Qinyu Xue & Rongzhen Jiao

  2. State Key Laboratory of Information Photonics and Optical Communication, Beijing University of Posts and Telecommunications, Beijing, 100876, China

    Rongzhen Jiao

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  1. Wentao Liang
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  2. Qinyu Xue
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  3. Rongzhen Jiao
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Correspondence to Rongzhen Jiao.

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Liang, W., Xue, Q. & Jiao, R. The performance of three-intensity decoy-state measurement-device-independent quantum key distribution. Quantum Inf Process 19, 165 (2020). https://doi.org/10.1007/s11128-020-02666-w

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