Efficient decoy-states for the reference-frame-independent measurement-device-independent quantum key distribution

• URL: http://arxiv.org/abs/2002.03672v4
• Date: Tue, 5 May 2020 02:42:54 GMT
• Title: Efficient decoy-states for the reference-frame-independent measurement-device-independent quantum key distribution
• Authors: Feng-Yu Lu, Zhen-Qiang Yin, Guan-Jie Fan-Yuan, Rong Wang, Hang Liu, Shuang Wang, Wei Chen, De-Yong He
• Abstract summary: RFI-MDI-QKD eliminates all possible attacks on detector side and necessity of reference-frame alignment in source sides. The performance of RFI-MDI-QKD is greatly improved in terms of secret key rate and achievable distance when statistical fluctuations are considered.
• Score: 22.452971995801686
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Reference-frame-independent measurement-device-independent quantum key distribution (RFI-MDI-QKD) is a novel protocol which eliminates all possible attacks on detector side and necessity of reference-frame alignment in source sides. However, its performance may degrade notably due to statistical fluctuations, since more parameters, e.g. yields and error rates for mismatched-basis events, must be accumulated to monitor the security. In this work, we find that the original decoy-states method estimates these yields over pessimistically since it ignores the potential relations between different bases. Through processing parameters of different bases jointly, the performance of RFI-MDI-QKD is greatly improved in terms of secret key rate and achievable distance when statistical fluctuations are considered. Our results pave an avenue towards practical RFI-MDI-QKD.

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