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Demonstration of quantum-enhanced rangefinding robust against classical jamming.

M P Mrozowski, R J Murchie, J Jeffers

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    This study introduces a quantum-enhanced lidar system that reliably detects targets and measures range, even with intense noise. It outperforms classical systems in challenging conditions, showcasing quantum correlations for advanced lidar applications.

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    Area of Science:

    • Quantum optics
    • Lidar technology
    • Signal processing

    Background:

    • Classical lidar systems struggle with strong, time-varying noise.
    • Detecting targets with low reflectivity (-52 dB) and high background noise is challenging.
    • Existing systems fail under fast- and slow-modulation jamming.

    Purpose of the Study:

    • To demonstrate a quantum-enhanced lidar system.
    • To achieve confident target detection and rangefinding in noisy environments.
    • To verify system resilience against jamming and low reflectivity targets.

    Main Methods:

    • Utilizing quantum correlations for enhanced signal detection.
    • Implementing a log-likelihood-based framework for dynamic background tracking.
    • Operating with over five orders of magnitude signal-to-background separation.

    Main Results:

    • Successful target detection and rangefinding in the presence of strong classical noise.
    • Resilience to fast- and slow-modulation jamming demonstrated.
    • Effective operation with target reflectivities as low as -52 dB.

    Conclusions:

    • Quantum-enhanced lidar offers significant advantages over classical systems.
    • The developed system provides a clear path for real-world lidar implementation.
    • Quantum correlations are crucial for overcoming noise limitations in lidar.