Quantum kinetic approach to time-resolved photoionization of atoms

TL;DR

This paper discusses quantum kinetic methods for modeling time-resolved photoionization in atoms, focusing on the Multiconfiguration Time-Dependent Hartree-Fock approach applied to a four-electron model atom under ultraviolet laser pulses.

Contribution

It introduces and applies the MCTDHF method to simulate the dynamics of multi-electron atoms during photoionization with ultrafast laser pulses.

Findings

Computed ground state energies of the model atom.

Simulated time-dependent photoionization processes.

Analyzed effects of different ultraviolet laser frequencies.

Abstract

Theoretical approaches to the photoionization of few-electron atoms are discussed. These include nonequilibrium Greens functions and wave function based approaches. In particular, the Multiconfiguration Time-Dependent Hartree-Fock method is discussed and applied to a model one-dimensional atom with four electrons. We compute ground state energies and the time-dependent photoionization by the field a strong laser pulse with two different frequencies in the ultraviolet.