Abstract
The ab initio -matrix with time method has recently been extended to allow simulation of fully nonperturbative multielectron processes in molecules driven by ultrashort arbitrarily polarized strong laser fields. Here we demonstrate the accuracy and capabilities of the current implementation of the method for two targets: We study single-photon and multiphoton ionization of and one-photon and strong-field ionization of and compare the results to available experimental and theoretical data as well as our own time-independent -matrix calculations. We obtain a highly accurate description of total and state-to-state single-photon ionization of and, using a simplified coupled-channel model, we show that state coupling is essential to obtain qualitatively correct results and that its importance as a function of laser intensity changes. We find that electron correlation plays a more important role at low intensities (up to approximately 50 ).
3 More- Received 30 April 2020
- Accepted 20 October 2020
- Corrected 25 February 2021
DOI:https://doi.org/10.1103/PhysRevA.102.052826
©2020 American Physical Society
Physics Subject Headings (PhySH)
Corrections
25 February 2021
Correction: The previously published Figure 8 was processed improperly during production, causing some dashed lines to appear as solid lines. The figure has now been replaced.