A general approach to few-cycle intense laser interactions with complex atoms
Abstract
A general {\it ab-initio} and non-perturbative method to solve the time-dependent Schr\"odinger equation (TDSE) for the interaction of a strong attosecond laser pulse with a general atom, i.e., beyond the models of quasi-one-electron or quasi-two-electron targets, is described. The field-free Hamiltonian and the dipole matrices are generated using a flexible -spline -matrix method. This numerical implementation enables us to construct term-dependent, non-orthogonal sets of one-electron orbitals for the bound and continuum electrons. The solution of the TDSE is propagated in time using the Arnoldi-Lanczos method, which does not require the diagonalization of any large matrices. The method is illustrated by an application to the multi-photon excitation and ionization of Ne atoms. Good agreement with -matrix Floquet calculations for the generalized cross sections for two-photon ionization is achieved.
Cite
@article{arxiv.0704.3239,
title = {A general approach to few-cycle intense laser interactions with complex atoms},
author = {X. Guan and O. Zatsarinny and K. Bartschat and B. I. Schneider and J. Feist and C. J. Noble},
journal= {arXiv preprint arXiv:0704.3239},
year = {2016}
}