Asynchronous measurement-device-independent quantum key distribution with hybrid source

• URL: http://arxiv.org/abs/2304.04569v3
• Date: Tue, 8 Aug 2023 00:35:03 GMT
• Title: Asynchronous measurement-device-independent quantum key distribution with hybrid source
• Authors: Jun-Lin Bai, Yuan-Mei Xie, Yao Fu, Hua-Lei Yin, Zeng-Bing Chen
• Abstract summary: We propose an AMDI-QKD protocol with a nonclassical light source. We show that our proposed hybrid source protocol significantly enhances the key rate of the AMDI-QKD protocol.
• Score: 6.7097515257155225
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The linear constraint of secret key rate capacity is overcome by the tiwn-field quantum key distribution (QKD). However, the complex phase-locking and phase-tracking technique requirements throttle the real-life applications of twin-field protocol. The asynchronous measurement-device-independent (AMDI) QKD or called mode-pairing QKD protocol can relax the technical requirements and keep the similar performance of twin-field protocol. Here, we propose an AMDI-QKD protocol with a nonclassical light source by changing the phase-randomized weak coherent state to a phase-randomized coherent-state superposition in the signal state time window. Simulation results show that our proposed hybrid source protocol significantly enhances the key rate of the AMDI-QKD protocol, while exhibiting robustness to imperfect modulation of nonclassical light sources.

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