Reconstruction of a single-active-electron potential from electron momentum distribution produced by strong-field ionization using optimization technique

TL;DR

This paper introduces an optimization-based method to reconstruct the single-active-electron potential in atoms or molecules from electron momentum distributions obtained through strong-field ionization, demonstrating high accuracy in numerical tests.

Contribution

It presents a novel approach combining optimization and numerical solutions of the Schrödinger equation to accurately reconstruct electron potentials from experimental momentum data.

Findings

High accuracy in potential reconstruction demonstrated in numerical simulations

Method effective for different potential representations including parametrization and grid-based

Potential reconstruction aligns well with the original potentials in test cases

Abstract

We present a method for retrieving of single-active electron potential in an atom or molecule from a given momentum distribution of photoelectrons ionized by a strong laser field. In this method the potential varying within certain limits is found as the result of the optimization procedure aimed at reproducing the given momentum distribution. The optimization using numerical solution of the time-dependent Schrodinger equation for ionization of a model one-dimensional atom shows the good accuracy of the potential reconstruction method. This applies to different ways used for representing of the potential under reconstruction, including a parametrization and determination of the potential by specifying its values on a spatial grid.