Attosecond photoionization dynamics in neon

TL;DR

This paper investigates how electron-electron correlation affects attosecond photoionization in neon, highlighting the importance of correlation effects for accurate quantitative predictions of ionization dynamics.

Contribution

It demonstrates the significance of electron-electron correlation in modeling neon's photoionization dynamics induced by attosecond XUV pulses, beyond mean-field approximations.

Findings

Mean-field Hartree-Fock provides qualitative results.

Correlation affects ionization cross section and time-delay.

Quantitative accuracy requires including electron-electron correlation.

Abstract

We study the role of electron-electron correlation in the ground-state of Ne, as well as in photoionization dynamics induced by an attosecond XUV pulse. For a selection of central photon energies around 100 eV, we find that while the mean-field time-dependent Hartree-Fock method provides qualitatively correct results for the total ionization yield, the photoionization cross section, the photoelectron momentum distribution as well as for the time-delay in photoionization, electron-electron correlation is important for a quantitative description of these quantities.