AI 中文总结
研究自发拉曼散射中的纠缠与光学非互易性，构建微观理论并结合累积量展开方法分析散射边带纠缠结构，识别相关特征，揭示拉曼散射诱导手性耦合及非互易放大，为基于拉曼的量子光子协议等建立理论框架。
AI 中文摘要
非弹性光散射是物理和生命科学中用于样本表征及无标记成像的核心工具。近期研究表明散射光也能呈现非经典关联。本文构建了拉曼散射微观理论，该理论与三波和四波混频中纠缠光子产生的既定描述自然相连，同时捕捉拉曼散射共振、耗散特性产生的本质差异。通过累积量展开方法，分析了散射边带的纠缠结构，识别出区分拉曼介导关联与传统非共振非线性波混频产生关联的特征。特别指出拉曼散射在斯托克斯和反斯托克斯边带间诱导手性耦合，导致相干种子场的非互易放大。这些结果为基于拉曼的量子光子协议建立了理论框架，并为量子增强拉曼光谱和成像指明了方向。
英文摘要
Inelastic light scattering is a central tool for sample characterization and label-free imaging across the physical and life sciences. Recent work has suggested that scattered light can also exhibit nonclassical correlations. Here, we develop a microscopic theory of Raman scattering that connects naturally to established descriptions of entangled-photon generation in three- and four-wave mixing, while capturing essential differences arising from the resonant, dissipative character of Raman scattering. Using a cumulant-expansion approach, we analyze the entanglement structure of the scattered sidebands and identify signatures that distinguish Raman-mediated correlations from those generated in conventional off-resonant nonlinear wave mixing. In particular, we show that Raman scattering induces chiral couplings between Stokes and anti-Stokes sidebands, leading to nonreciprocal amplification of coherent seed fields. These results establish a theoretical framework for Raman-based quantum photonic protocols and suggest routes toward quantum-enhanced Raman spectroscopy and imaging.
