Quantum-like nonlinear interferometry with frequency-engineered classical light

Romain Dalidet, Anthony Martin, Grégory Sauder, Laurent Labonté, Sébastien Tanzilli
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Abstract

Quantum interferometry methods exploit quantum resources, such as photonic entanglement, to enhance phase estimation beyond classical limits. Nonlinear optics has served as a workhorse for the generation of entangled photon pairs, ensuring both energy and phase conservation, but at the cost of limited rate and degraded signal-to-noise ratio compared to laser-based interferometry approaches. We present a "quantum-like" nonlinear optical method that reaches super-resolution in single-photon detection regime. This is achieved by replacing photon-pairs by coherent states of light, mimicking quantum properties through classical nonlinear optics processes. Our scheme utilizes two high-brightness lasers. This results in a substantially greater signal-to-noise ratio compared to its quantum counterpart. Such an approach paves the way to significantly reduced acquisition times, providing a pathway to explore signals across a broader range of bandwidth. The need to increase the frequency bandwidth of the quantum sensor significantly motivates the potential applications of this pathway.
用频率工程经典光进行类量子非线性干涉测量
量子干涉测量方法利用量子资源(如光子纠缠)来提高相位估计能力,使其超越经典极限。非线性光学是产生纠缠光子对的主要手段,可确保能量和相位守恒,但与基于激光的干涉测量方法相比,其代价是速率有限和信噪比下降。我们提出了一种 "类量子 "非线性光学方法,它能在单光子检测系统中达到超分辨率。这是通过相干光态取代光子对,通过经典非线性光学过程模拟量子特性来实现的。我们的方案利用了两个高亮度激光器。与量子方法相比,这种方法的信噪比大大提高。这种方法大大缩短了采集时间,为在更宽的带宽范围内探索信号提供了途径。提高量子传感器频率带宽的需求极大地激发了这种方法的潜在应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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