论文标题
带有明亮挤压频率梳子的量子增强吸收光谱
Quantum-enhanced absorption spectroscopy with bright squeezed frequency combs
论文作者
论文摘要
吸收光谱是一种广泛使用的技术，可在低浓度下检测和表征气体物种。我们提出了一种传感策略，将频率调制光谱的优势与通过挤压探针状态访问的降低噪声特性相结合。同源性检测方案允许在多个频率下同时测量吸收，并且可以在整个吸收曲线上分散稳定。我们预测信噪比的显着提高，该比率与挤压因子成倍尺度。超出标准量子限制的数量级改进，最先进的挤压水平促进了高精度的气体感应。
Absorption spectroscopy is a widely used technique that permits the detection and characterization of gas species at low concentrations. We propose a sensing strategy combining the advantages of frequency modulation spectroscopy with the reduced noise properties accessible by squeezing the probe state. A homodyne detection scheme allows the simultaneous measurement of the absorption at multiple frequencies and is robust against dispersion across the absorption profile. We predict a significant enhancement of the signal-to-noise ratio that scales exponentially with the squeezing factor. An order of magnitude improvement beyond the standard quantum limit is possible with state-of-the-art squeezing levels facilitating high precision gas sensing.
