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Analysis of measurement-device-independent quantum key distribution under asymmetric channel transmittance efficiency

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Abstract

Measurement-device-independent quantum key distribution (MDI-QKD) is immune to all the detection attacks. Based on decoy-state method, MDI-QKD can be implemented with nonperfect single-photon sources. In this paper, the performance of three-intensity decoy-state MDI-QKD under asymmetric channel transmittance efficiency is considered and compared with the results under the symmetric choice scenario. The relation between security key generation rate and the total transmission loss is shown with exchanged ratio of the two distances between Alice to the untrusted third party and Bob to the third party. Based on the relationship, an optimal intensity method is proposed to improve the key rate for a fixed distance ratio, which will provide important parameters for practical experiment.

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Acknowledgments

The authors thank S.H. Sun for many helps. This work is partially supported by the NSFC Grant No. 6110606

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Authors and Affiliations

  1. College of Information and Navigation, Air Force Engineering University, Feng Hao street, Xi’an, 710077, China

    Dong Chen, Zhao Shang-Hong, Zhao Wei-Hu, Shi Lei & Zhao Gu-Hao

  2. Xi’an Communication College, Xi’an, 710006, China

    Dong Chen

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  1. Dong Chen
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  2. Zhao Shang-Hong
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  3. Zhao Wei-Hu
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  4. Shi Lei
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  5. Zhao Gu-Hao
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Correspondence to Dong Chen.

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Chen, D., Shang-Hong, Z., Wei-Hu, Z. et al. Analysis of measurement-device-independent quantum key distribution under asymmetric channel transmittance efficiency. Quantum Inf Process 13, 2525–2534 (2014). https://doi.org/10.1007/s11128-014-0806-y

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  • DOI: https://doi.org/10.1007/s11128-014-0806-y

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