Mode-pairing quantum key distribution with advantage distillation

• URL: http://arxiv.org/abs/2304.03534v3
• Date: Thu, 13 Apr 2023 04:00:28 GMT
• Title: Mode-pairing quantum key distribution with advantage distillation
• Authors: Xin Liu, Di Luo, Zhenrong Zhang, and Kejin Wei
• Abstract summary: Mode-pairing quantum key distribution (MP-QKD) is an easy-to-implement scheme that transcends the Pirandola--Laurenza--Ottaviani--Banchi bound without using quantum repeaters. We present an improvement of the performance of MP-QKD using an advantage distillation method.
• Score: 2.984942672980935
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Mode-pairing quantum key distribution (MP-QKD) is an easy-to-implement scheme that transcends the Pirandola--Laurenza--Ottaviani--Banchi bound without using quantum repeaters. In this paper, we present an improvement of the performance of MP-QKD using an advantage distillation method. The simulation results demonstrate that the proposed scheme extends the transmission distance significantly with a channel loss exceeding 7.6 dB. Moreover, the scheme tolerates a maximum quantum bit error rate of 8.9%, which is nearly twice that of the original MP-QKD. In particular, as the system misalignment error increases, the expandable distance of the proposed scheme also increases. The proposed system is expected to promote the practical implementation of MP-QKD in a wide range of applications, particularly in scenarios involving high channel losses and system errors.

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