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The enhanced measurement-device-independent quantum key distribution with two-intensity decoy states

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Abstract

We put forward a new scheme for implementing the measurement-device-independent quantum key distribution (QKD) with weak coherent source, while using only two different intensities. In the new scheme, we insert a beam splitter and a local detector at both Alice’s and Bob’s side, and then all the triggering and non-triggering signals could be employed to process parameter estimations, resulting in very precise estimations for the two-single-photon contributions. Besides, we compare its behavior with two other often used methods, i.e., the conventional standard three-intensity decoy-state measurement-device-independent QKD and the passive measurement-device-independent QKD. Through numerical simulations, we demonstrate that our new approach can exhibit outstanding characteristics not only in the secure transmission distance, but also in the final key generation rate.

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Acknowledgments

We gratefully acknowledge the financial support from the National Natural Science Foundation of China through Grants Nos. 11274178, 61475197 and 61590932, the Natural Science Foundation of the Jiangsu Higher Education Institutions through Grant No. 15KJA120002, the Outstanding Youth Project of Jiangsu Province through Grant No. BK20150039 and the Priority Academic Program Development of Jiangsu Higher Education Institutions through Grant No. YX002001.

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Authors and Affiliations

  1. Institute of Signal Processing Transmission, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China

    Jian-Rong Zhu, Feng Zhu, Xing-Yu Zhou & Qin Wang

  2. Key Lab of Broadband Wireless Communication and Sensor Network Technology, Nanjing University of Posts and Telecommunications, Ministry of Education, Nanjing, 210003, China

    Jian-Rong Zhu, Feng Zhu, Xing-Yu Zhou & Qin Wang

  3. Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026, China

    Qin Wang

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  1. Jian-Rong Zhu
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  2. Feng Zhu
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Correspondence to Qin Wang.

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Zhu, JR., Zhu, F., Zhou, XY. et al. The enhanced measurement-device-independent quantum key distribution with two-intensity decoy states. Quantum Inf Process 15, 3799–3813 (2016). https://doi.org/10.1007/s11128-016-1371-3

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  • DOI: https://doi.org/10.1007/s11128-016-1371-3

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