Reference-frame-independent measurement-device-independent quantum key distribution with imperfect sources

• URL: http://arxiv.org/abs/2102.10638v1
• Date: Sun, 21 Feb 2021 16:28:50 GMT
• Title: Reference-frame-independent measurement-device-independent quantum key distribution with imperfect sources
• Authors: Jian-Rong Zhu, Chun-Mei Zhang, Qin Wang
• Abstract summary: We propose a robust RFI-MDI-QKD protocol which is robust against state preparation flaws. Our scheme can be realized with only four flawed states, which improves the practical security of RFI-MDI-QKD.
• Score: 2.4331238547907876
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Reference-frame-independent measurement-device-independent quantum key distribution (RFI-MDI-QKD) can remove all potential detector side-channel attacks and the requirement of real-time alignment of reference frames. However, all previous RFI-MDI-QKD implementations assume the perfect state preparation in sources, which is impractical and may lead to security loopholes. Here, we propose a RFI-MDI-QKD protocol which is robust against state preparation flaws. Comparing to the conventional six-state RFI-MDI-QKD, our scheme can be realized with only four flawed states, which improves the practical security of RFI-MDI-QKD and simplifies the experimental implementation. In addition, simulation results demonstrate that source flaws in Z basis have adverse effect on the performance of RFI-MDI-QKD while the source flaws in X and Y bases have almost no effect. We hope that this work could provide a valuable reference for practical implementations of RFI-MDI-QKD.

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