Attosecond time delay in valence photoionization and photorecombination of argon: a TDLDA study

TL;DR

This study uses the TDLDA method to analyze quantum phases and attosecond time delays in argon's valence photoionization and photorecombination, aligning well with recent experimental results.

Contribution

It applies the TDLDA approach to accurately compute and analyze time delays in argon's valence electron processes, providing theoretical support for experimental findings.

Findings

Excellent agreement with recent experimental measurements

Accurate calculation of 3s-3p time delays in argon

Validation of TDLDA for attosecond electron dynamics

Abstract

We determine and analyze the quantum phases and time delays in photoionization and photorecombination of valence 3p and 3s electrons of argon using the Kohn-Sham local density functional approach. The time-dependent local density approximation (TDLDA) is used to account for the electron correlation. Resulting attosecond Wigner-Smith time delays show excellent agreements with two recent independent experiments on argon that measured the relative 3s-3p time delay in photoionization [Physical Review Letters {\bf 106}, 143002 (2011)] and the delay in 3p photorecombination [Physical Review Letters {\bf 112}, 153002 (2014)]