Measurement-device-independent quantum key distribution of multiple degrees of freedom of a single photon |
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| Authors: | Yu-Fei Yan Lan Zhou Wei Zhong Yu-Bo Sheng |
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| Affiliation: | 1. Institute of Quantum Information and Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China2. Schoool of Science, Nanjing University of Posts and Telecommunications, Nanjing 210003, China3. Key Lab of Broadband Wireless Communication and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, China |
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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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| Keywords: | measurement-device-independent quantum key distribution polarization longitudinal-momentum key generation rate |
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