Autoionizing States driven by Stochastic Electromagnetic Fields

Abstract

We have examined the profile of an isolated autoionizing resonance driven by a pulse of short duration and moderately strong field. The analysis has been based on stochastic differential equations governing the time evolution of the density matrix under a stochastic field. Having focused our quantitative analysis on the $2s2p({}^{1}P)$ resonance of Helium, we have investigated the role of field fluctuations and of the duration of the pulse. We report surprisingly strong distortion of the profile, even for peak intensity below the strong field limit. Our results demonstrate the intricate connection between intensity and pulse duration, with the latter appearing to be the determining influence, even for a seemingly short pulse of 50 fs. Further effects that would arise under much shorter pulses are discussed.

10 pages, 2 figures

References in corpus (3)

• Attosecond dynamics through a Fano resonance: Monitoring the birth of a photoelectron
• Femtosecond induced transparency and absorption in the extreme ultraviolet by coherent coupling of the He 2s2p (1P0) and 2p2 (1Se) double excitation states with 800 nm light
• Effects of free-electron-laser field fluctuations on the frequency response of driven atomic resonances

Cited by in corpus (3)

• Strong-field extreme-ultraviolet dressing of atomic double excitation
• Effects of Field Fluctuations on Driven Autoionizing Resonances
• The non-Hermitian landscape of autoionization