标题： 动态共振荧光的谱相关性 显示英文标题

标题： Spectral correlations of dynamical Resonance Fluorescence

摘要： 频域滤波的光子关联已被证明在理解探测过程如何改变光子统计特性方面非常有用。 利用光谱关联还可以精炼发射特性，并揭示在连续波激发下多种量子光学系统中以前隐藏的强关联。 在本工作中，我们研究了时变激发下的此类关联，并开发了一种有效计算时间积分关联的方法，这些关联是光子计数理论的核心，随后将其应用于分析脉冲系统的光子发射。 通过将该形式化方法与传感器方法相结合——该方法有助于实现频域分辨的关联——我们展示了频谱过滤如何提高单光子纯度并抑制时域编码量子态中的多光子噪声。 具体而言，对动态驱动的两能级系统中心光谱峰进行过滤可以增强时间相干性，并在有利于多光子发射的条件下提高时域纠缠制备的保真度。 这些结果确立了频谱过滤作为调节脉冲量子光源光子统计特性的重要工具。 显示英文摘要

摘要： Frequency-filtered photon correlations have been proven to be extremely useful in grasping how the detection process alters photon statistics. Harnessing the spectral correlations also permits refinement of the emission and unraveling of previously hidden strong correlations in a plethora of quantum-optical systems under continuous-wave excitation. In this work, we investigate such correlations for time-dependent excitation and develop a methodology to compute efficiently time-integrated correlations, which are at the heart of the photon-counting theory, and subsequently apply it to analyze the photon emission of pulsed systems. By combining this formalism with the sensor method -- which facilitates frequency-resolved correlations -- we demonstrate how spectral filtering enhances single-photon purity and suppresses multi-photon noise in time-bin-encoded quantum states. Specifically, filtering the central spectral peak of a dynamically driven two-level system boosts temporal coherence and improves the fidelity of time-bin entanglement preparation, even under conditions favoring multi-photon emission. These results establish spectral filtering as a critical tool for tailoring photon statistics in pulsed quantum light sources.