Alternative gauge for the description of the light-matter interaction in a relativistic framework
Atomic Physics
2017-09-06 v1
Abstract
We present a generalized velocity gauge form of the relativistic laser-matter interaction. In comparison with the (equivalent) regular minimal coupling description, this new form of the light-matter interaction results in superior convergence properties for the numerical solution of the time-dependent Dirac equation. This applies both to the numerical treatment and, more importantly, to the multipole expansion of the laser field. The advantages of the alternative gauge is demonstrated in hydrogen by studies of the dynamics following the impact of superintense laser pulses of extreme ultraviolet wavelengths and sub-femtosecond duration.
Keywords
Cite
@article{arxiv.1706.09049,
title = {Alternative gauge for the description of the light-matter interaction in a relativistic framework},
author = {Tor Kjellsson and Morten Førre and Aleksander Skjerlie Simonsen and Sølve Selstø and Eva Lindroth},
journal= {arXiv preprint arXiv:1706.09049},
year = {2017}
}