Quantum control of Rabi dynamics using chirped extreme ultraviolet pulses

作者：Dongyang He, Boren Shen, Yi-Jia Mao, Zhaohan Zhang, Mingrui He, Yang Li, Feng He · 发表于：New Journal of Physics · 年份：2025 · DOI：10.1088/1367-2630/ae1865 · 被引用次数：2 · 研究领域：Laser-Matter Interactions and Applications、Quantum chaos and dynamical systems、Quantum optics and atomic interactions

Abstract We present a theoretical study on the quantum control of ultrafast Rabi dynamics in atoms driven by chirped extreme ultraviolet (XUV) pulses. Motivated by recent experimental advances using free-electron lasers, we derive an analytical solution of the Rabi oscillation under the rotating wave approximation, incorporating the spectral chirp of the XUV field. Within the essential-states model, we demonstrate how the chirp modulates the phase of the excited-state amplitude, inducing an observable asymmetry in the Autler–Townes (AT) doublets of the photoelectrons. Our theoretical predictions, benchmarked against time-dependent Schrödinger equation simulations, reveal that chirp-dependent phase modulation governs the spectral asymmetry, offering a time-domain perspective for interpreting strong-field photoionization at short wavelengths. This work provides a compact analytical framework for chirp-mediated coherent control in the XUV regime and sheds light on recent experimental observations of asymmetric AT structures in helium.