Quantum Enhanced Precision Estimation of Transmission with Bright Squeezed Light
Quantum Enhanced Precision Estimation of Transmission with Bright Squeezed Light
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DOI：
10.1103/physrevapplied.16.044031
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发表时间：
2021-10-19
影响因子：
4.6
通讯作者：
Matthews, J. C. F.
中科院分区：
文献类型：
--
作者：
Atkinson, G. S.;Allen, E. J.;Matthews, J. C. F.
压缩光使测量灵敏度超过量子噪声极限（QNL），用于光学技术，如光谱学，引力波探测，磁力测量和成像。测量的精确度-通过重复估计的方差来量化-也已经使用压缩光来增强超过QNL。然而，亚QNL灵敏度不足以实现亚QNL精度。此外，在估计传输中的子QNL精度的演示已被限制在探测功率的皮瓦。在这里，我们展示了同时增强的精度和灵敏度超出QNL估计调制传输与0.2 mW的平均（25 W峰值）功率，这是8个数量级以上的功率限制以前的subQNL精度测量传输的压缩幅度探头。我们的方法使测量与当前经典技术的光功率竞争，但同时提高了精度和灵敏度，超出了经典的限制。
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 subQNL 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.