激光辅助Fano共振：阿秒量子调控与动力学成像
Laser-assisted Fano resonance: attosecond quantum control and dynamical imaging
AI总结：
本研究提出激光辅助Fano共振概念，通过额外激光场调控干涉路径相位，实现阿秒尺度主动控制，并结合高分辨实验完成共振电子波包时域动力学成像与光电离时间延迟测量，为复杂系统阿秒量子调控奠基。
摘要：
Fano共振源于离散态与连续态之间的路径干涉，在物理学、化学和材料科学的诸多分支中发挥着基础性作用。本文提出激光辅助Fano共振的概念：该共振由两条干涉路径通过额外激光场耦合形成，激光场可在两条路径间引入可控相位延迟，从而产生能在阿秒时间尺度上主动调控的广义Fano线型。基于分辨率达到前所未有的实验结果，我们直接在时域对共振电子波包的演化过程进行动力学成像，同时提取其振幅和相位，借此实现共振光电离时间延迟的测量。采用物理图像清晰的两能级模型开展的从头算与模拟结果与实验结果吻合，为将本研究的概念拓展至复杂系统的阿秒量子调控奠定了基础。
英文摘要：
A Fano resonance arises from the pathway interference between discrete and continuum states, playing a fundamental role in many branches of physics, chemistry and material science. Here, we introduce the concept of a laser-assisted Fano resonance, created from two interferometric pathways that are coupled together by an additional laser field, which introduces a controllable phase delay between them and results in a generalized Fano lineshape that can be actively controlled on the {\it attosecond} time scale. Based on our experimental results of unprecedented resolution, we dynamically image a resonant electron wave packet during its evolution directly in the time domain, extracting both the amplitude and the phase, which allows for the measurement of the {\it resonant} photoionization time delay. Ab-initio calculations and simulations employing a physically transparent two-level model agree with our experimental results, laying the groundwork for extending our concepts into attosecond quantum control of complex systems.
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