Dg. Lappas et al., 2-ELECTRON EFFECTS IN HARMONIC-GENERATION AND IONIZATION FROM A MODELHE ATOM, Journal of physics. B, Atomic molecular and optical physics, 29(16), 1996, pp. 619-627
We present numerical ab initio calculations for a two-electron quantum
system that is a one-dimensional analogue of the He atom in a strong
laser held. Electron correlation occurring within this model can be tr
eated exactly. We compare our calculations with a single-electron mode
l that employs a proper effective potential for the 'outer' electron.
Evidence of fast correlated double ionization is presented and discuss
ed.