Dresden 2011 – scientific programme
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A: Fachverband Atomphysik
A 14: Interaction with VUV and X-ray light III
A 14.4: Talk
Friday, March 18, 2011, 11:45–12:00, BAR 106
Interaction of atoms with strong fields: Time propagation of electron wave packets with the Solov’iev-Fatunla method — •Johannes Eiglsperger1,2, Aliou Hamido3, Javier Madroñero1, and Bernard Piraux3 — 1Physik Department, Technische Universität München, Germany — 2Institut für Theoretische Physik, Universität Regensburg, Germany — 3Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Belgium
The study of the quantum dynamics of driven complex atomic systems is a fundamental problem in atomic physics and a challenge for both experiments and theory. The recent development of new XUV laser sources have opened the route to the study of multiphoton multiple ionization or excitation of atoms at high frequency and intensity. This poses new challenges for both theoreticians and experimentalists. From the theoretical point of view the validity of strong field approximations is questionable. More accurate techniques for the solution of the time-dependent Schrödinger equation (TDSE) are necessary. We present a promising alternative for the treatment of the TDSE which combines an explicit method adapted to solve systems of stiff equations [1,2] and a time-dependent scaling transformation of the coordinates [3]. With this approach we have investigated the influence of the atomic structure on the low energy part of the Above-Threshold-Ionization spectrum for a model potential and the hydrogen atom.
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J. Madroñero and B. Piraux, Phys. Rev. A 80, 033409 (2009).
E. A. Soloviev and S. I. Vinitsky, J. Phys. B 18, L557 (1985).