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Improving the performance of four-intensity decoy-state measurement-device-independent quantum key distribution via heralded pair-coherent sources

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Abstract

Measurement-device-independent quantum key distribution (MDI-QKD) can remove all the side-channel attacks and significantly improve the secure transmission distance. However, the key generation rate is relatively low when taking finite-key-size effect into consideration. In this manuscript, we adopt the latest four-intensity decoy-state scheme combining the heralded pair-coherent sources to study the performance of the MDI-QKD. Moreover, through utilizing joint constraints and collective error estimation techniques, we can obviously improve the performance of practical MDI-QKD systems compared with those using weak coherent sources or heralded single-photon sources.

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Funding

National Key Research and Development Program of China (Grants No. 2018YFA0306400, 2017YFA0304100); National Natural Science Foundation of China (Grants No. 11774180, 61590932, 61705110, 11847215); China Postdoctoral Science Foundation (Grant No. 2018M642281); Postgraduate Research and Practice Innovation Program of Jiangsu Province (Grant No. 46002CX17792).

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Authors and Affiliations

  1. Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China

    Chen-Chen Mao, Chun-Hui Zhang, Chun-Mei Zhang & Qin Wang

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

    Chen-Chen Mao, Chun-Hui Zhang, Chun-Mei Zhang & Qin Wang

  3. Telecommunication and Networks, National Engineering Research Center, NUPT, Nanjing, 210003, China

    Chen-Chen Mao, Chun-Hui Zhang, Chun-Mei Zhang & Qin Wang

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  1. Chen-Chen Mao
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  2. Chun-Hui Zhang
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  4. Qin Wang
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Correspondence to Qin Wang.

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Mao, CC., Zhang, CH., Zhang, CM. et al. Improving the performance of four-intensity decoy-state measurement-device-independent quantum key distribution via heralded pair-coherent sources. Quantum Inf Process 18, 290 (2019). https://doi.org/10.1007/s11128-019-2404-5

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