Transition from Rabi oscillations to dynamic interference: The multipeak pattern of the Autler-Townes doublet revisited

Elarabi, A.A. and Csehi, András (2025) Transition from Rabi oscillations to dynamic interference: The multipeak pattern of the Autler-Townes doublet revisited. PHYSICAL REVIEW A, 111 (3). ISSN 2469-9926

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Abstract

Recent studies have shown that both Rabi oscillations (ROs) and dynamic interference (DI) lead to pronounced multipeak patterns in the spectrum of ionized photoelectrons. These two prominent dynamical effects - characteristic of intense, short, and (near-)resonant laser pulses interacting with matter - usually coexist, and are thus hard to distinguish. Here, we revisit the multipeak pattern of the Autler-Townes doublet to uncover its physical origin, by calculating the photoelectron spectrum accurately. Our joint analytical and numerical analysis reveals that selectively populating the two emerging dynamically dressed states is key to an efficient balancing between ROs and DI. We demonstrate physical situations where either ROs or DI dictate the spectrum shape, and explore the transition between these regimes. The present work provides further insight into our results reported in a previous work [Phys. Rev. A 108, L061101 (2023)2469-992610.1103/PhysRevA.108.L061101]. © 2025 American Physical Society.

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