Time-Dependent Density-Functional Theory of Strong-Field Ionization of Atoms under Soft X-Rays
Abstract
We demonstrate the capabilities of time-dependent density functional theory (TDDFT) for strong-field, short wavelength (soft X-ray) physics, as compared to a formalism based on rate equations. We find that TDDFT provides a very good description of the total and individual ionization yields for Ne and Ar atoms exposed to strong laser pulses. We assess the reliability of different adiabatic density functionals and conclude that an accurate description of long-range interactions by the exchange and correlation potential is crucial for obtaining the correct ionization yield over a wide range of intensities ( -- W/cm). Our TDDFT calculations disentangle the contribution from each ionization channel based on the Kohn-Sham wavefunctions.
Keywords
Cite
@article{arxiv.1408.6067,
title = {Time-Dependent Density-Functional Theory of Strong-Field Ionization of Atoms under Soft X-Rays},
author = {Alison Crawford-Uranga and Umberto De Giovannini and Esa Räsänen and Micael Jose Tourdot de Oliveira and Duncan John Mowbray and George M. Nikolopoulos and Evangelos T. Karamatskos and Dimitris Markellos and Peter Lambropoulos and Stefan Kurth and Angel Rubio},
journal= {arXiv preprint arXiv:1408.6067},
year = {2014}
}
Comments
8 pages, 6 figures, 1 table