Drift of the scattered wave packet in strong-field atomic stabilization

Details of the dynamics of ultrastrong-field photoionization are studied for a one-dimensional model atom with a short-range potential. The wave packet’s drift due to its scattering on the binding potential is analyzed. The Kramers-Henneberger frame transformation is generalized in such a way that the drift is formally included and the packet’s shape becomes stable in the new frame. Such an approach in combination with the Ehrenfest description of the drift trajectory allows one to model the behavior of the packet and to interpret the details of the atomic stabilization.