量子光光谱的输入-输出表述

中文摘要 AI 辅助

我们通过将量子光学中常用的输入-输出理论与化学物理中常用的非线性光谱微扰展开方法相结合，发展了量子光光谱（QLS）的输入-输出表述。输入-输出关系的使用为物质系统如何改变光子输入场提供了物理直觉。作为示例，我们考虑了线性光谱、荧光、束内$G^{(2)}$以及Hong-Ou-Mandel关联。对于某些初始光子态，我们表明信号期望值可以非微扰地评估。对于一般的初始光子态，信号可以通过输入-输出关系的微扰展开来计算。输入-输出关系减少了微扰展开光学信号所需的工作量，从而允许更简洁的推导和更清晰的物理解释。

英文摘要

We develop an input-output formulation of quantum light spectroscopy (QLS) by combining the input-output theory, commonly used in quantum optics, with the perturbative expansion method for nonlinear spectroscopy, commonly used in chemical physics. The use of the input-output relation provides physical intuition for how matter systems alter the photon input field. As examples, we consider linear spectroscopy, fluorescence, intra-beam $G^{(2)}$, and Hong-Ou-Mandel correlation. For certain initial photon states, we show that signal expectation values can be evaluated non-perturbatively. For general initial photon states, the signals can be computed via a perturbative expansion of the input-output relation. The input-output relation reduces the work needed to perturbatively expand the optical signal, allowing for cleaner derivations and clearer physical interpretations.

发表机构

• University of California, Berkeley（加州大学伯克利分校）
• Kavli Energy Nanoscience Institute at Berkeley（加州大学伯克利分校卡弗里能源纳米科学研究所）

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