论文标题
量子增强的精确估计，并用明亮的挤压光进行传播
Quantum Enhanced Precision Estimation of Transmission with Bright Squeezed Light
论文作者
论文摘要
挤压光实现了超出量子噪声极限（QNL）的灵敏度的测量值，例如光谱，引力波检测，磁力测定法和成像。通过挤压光还可以增强测量的精度 - 通过重复估计的方差量化。但是，亚QNL敏感性不足以实现子QNL精度。此外，估计传输中亚QNL精度的演示仅限于探针功率的picowatts。在这里，我们证明了对QNL超出QNL的精度和灵敏度的同时增强，以估算调制传输，并以0.2 MW的平均功率（25 W峰值）挤压探针（25 W峰值），即比以前的Sub-QNL精度测量传输的先前子QNL精度测量的功率限制。我们的方法实现了与当前经典技术的光学能力竞争的测量值，但既提高了精度和灵敏度，又超出了经典限制。
Squeezed light enables measurements with sensitivity beyond the quantum noise limit (QNL) for optical techniques such as spectroscopy, gravitational wave detection, magnetometry and imaging. Precision of a measurement -- as quantified by the variance of repeated estimates -- has also been enhanced beyond the QNL using squeezed light. However, sub-QNL sensitivity is not sufficient to achieve sub-QNL precision. Furthermore, demonstrations of sub-QNL precision in estimating transmission have been limited to picowatts of probe power. Here we demonstrate simultaneous enhancement of precision and sensitivity to beyond the QNL for estimating modulated transmission with a squeezed amplitude probe of 0.2 mW average (25 W peak) power, which is 8 orders of magnitude above the power limitations of previous sub-QNL precision measurements of transmission. Our approach enables measurements that compete with the optical powers of current classical techniques, but have both improved precision and sensitivity beyond the classical limit.
