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Measurement-device-independent quantum key distribution of multiple degrees of freedom of a single photon

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Abstract

Measurement-device-independent quantum key distribution (MDI-QKD) provides us a powerful approach to resist all attacks at detection side. Besides the unconditional security, people also seek for high key generation rate, but MDI-QKD has relatively low key generation rate. In this paper, we provide an efficient approach to increase the key generation rate of MDI-QKD by adopting multiple degrees of freedom (DOFs) of single photons to generate keys. Compared with other high-dimension MDI-QKD protocols encoding in one DOF, our protocol is more flexible, for our protocol generating keys in independent subsystems and the detection failure or error in a DOF not affecting the information encoding in other DOFs. Based on above features, our MDI-QKD protocol may have potential application in future quantum communication field.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China under Grant Nos. 11974189 and 12005106, the Postgraduate Research & Practice Innovation Program of Jiangsu Province under Grant No. SJCX19-0241, and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions.

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Authors and Affiliations

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

    Yu-Fei Yan, Wei Zhong & Yu-Bo Sheng

  2. Schoool of Science, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China

    Lan Zhou

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

    Wei Zhong & Yu-Bo Sheng

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  1. Yu-Fei Yan
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Yan, YF., Zhou, L., Zhong, W. et al. Measurement-device-independent quantum key distribution of multiple degrees of freedom of a single photon. Front. Phys. 16, 11501 (2021). https://doi.org/10.1007/s11467-020-1005-1

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