Automated generation of photonic circuits for Bell tests with homodyne measurements

• URL: http://arxiv.org/abs/2410.19670v1
• Date: Fri, 25 Oct 2024 16:24:29 GMT
• Title: Automated generation of photonic circuits for Bell tests with homodyne measurements
• Authors: Corentin Lanore, Federico Grasselli, Xavier Valcarce, Jean-Daniel Bancal, Nicolas Sangouard,
• Abstract summary: Nonlocal quantum realizations are core resources for device-independent quantum information processing. We present an automated framework for designing photonic implementations of nonlocal realizations. We find an experimental setup, robust to losses, that yields a CHSH violation of boldsymbol$2.068$ with boldsymbol$3.9$dB and boldsymbol$0.008$dB squeezed light sources and two beam splitters.
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• Abstract: Nonlocal quantum realizations, certified by the violation of a Bell inequality, are core resources for device-independent quantum information processing. Although proof-of-principle experiments demonstrating device-independent quantum information processing have already been reported, identifying physical platforms that are realistically closer to practical, viable devices remains a significant challenge. In this work, we present an automated framework for designing photonic implementations of nonlocal realizations using homodyne detections and quantum state heralding. Combining deep reinforcement learning and efficient simulations of quantum optical processes, our method generates photonic circuits that achieve significant violations of the Clauser-Horne-Shimony-Holt inequality. In particular, we find an experimental setup, robust to losses, that yields a CHSH violation of \boldsymbol{$2.068$} with \boldsymbol{$3.9$}~dB and \boldsymbol{$0.008$}~dB squeezed light sources and two beam splitters.

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