Machine Learning based Optimization of CV-QKD Under Practical Constraints

• URL: http://arxiv.org/abs/2606.31534v1
• Date: Tue, 30 Jun 2026 11:50:39 GMT
• Title: Machine Learning based Optimization of CV-QKD Under Practical Constraints
• Abstract summary: We develop a machine learning-based end-to-end optimization framework that jointly optimize transmitter pulse shaping and receiver matched filtering.<n>By mitigating mode mismatch and accounting for implementation constraints, the proposed method improves overall system performance.
• Score: 0.46906883107634073
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Practical hardware limitations, including finite transmitter and receiver filter lengths as well as the finite resolution of digital-to-analog and analog-to-digital converters, lead to mode mismatch and degrade the performance of continuous-variable quantum key distribution systems. To address this, we develop a machine learning-based end-to-end optimization framework that jointly optimizes transmitter pulse shaping and receiver matched filtering. The approach employs reinforcement learning under realistic hardware constraints, including a limited number of filter taps, finite digital-to-analog and analog-to-digital converter resolution, analog low-pass filtering, and the optimal mean photon number. By mitigating mode mismatch and accounting for implementation constraints, the proposed method improves overall system performance. Simulation results demonstrate enhanced secure key rates compared to conventional approaches, demonstrating the effectiveness of the proposed framework.

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