Abstract
The dynamics of recombination in an ultrastrong laser field is studied by numerical simulations performed for one-dimensional (1D), two-dimensional, and three-dimensional atomic systems modeled by the hydrogen atom Coulomb potential as well as by a model potential with a smoothed core. A nonmonotonic behavior of the total bound-states' final population is studied as a function of the laser field amplitude. The dependence of the results on the used atomic potential is demonstrated. It is shown that the recombination probabilities calculated in these two cases may differ even qualitatively. Even eigenstates of the 1D hydrogen atom are shown to play a significant role in the time evolution.
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