Restricted space ab initio models for double ionization by strong laser pulses

TL;DR

This paper evaluates reduced dimensionality models for simulating double ionization of atoms by intense laser pulses, comparing their accuracy in predicting ionization yields and electron momentum distributions.

Contribution

It systematically assesses the performance of various algorithms and the impact of model dimensionality on double ionization simulations.

Findings

Reduced models can approximate ionization yields effectively.

Dimensionality influences electron momentum distribution predictions.

Algorithm performance varies with model complexity.

Abstract

Double electron ionisation process occurs when an intense laser pulse interacts with atoms or molecules. Exact {\it ab initio} numerical simulation of such a situation is extremely computer resources demanding, thus often one is forced to apply reduced dimensionality models to get insight into the physics of the process. The performance of several algorithms for simulating double electron ionization by strong femtosecond laser pulses are studied. The obtained ionization yields and the momentum distributions of the released electrons are compared, and the effects of the model dimensionality on the ionization dynamics discussed.