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A: Fachverband Atomphysik
A 21: Atomic systems in external fields
A 21.3: Talk
Thursday, March 13, 2008, 11:45–12:00, 3D
Complex electron dynamics in integrable systems — •Tobias Kramer1, Christian Bracher2, and John Delos3 — 1Institut I: Theoretische Physik, Universität Regensburg, Germany — 2California State University, Long Beach, USA — 3College of William and Mary, Williamsburg, USA
The classical dynamics of photoionization and detachment in the presence of external fields is in general very complex, even for integrable systems. The corresponding quantum mechanical cross section and spectra show strong fluctuations due to interference of returning orbits. We present analytic classical and quantum mechanical results for atoms in magnetic and electric fields which allow to study in detail sequences of bifurcation points, caustics, and failures of a primitive semiclassical expansions. The statistical analysis of the spectrum shows that classical chaotic and integrable systems are not always distinguishable by looking at spectral correlation functions.
References:
[1] Electron dynamics in parallel electric and magnetic fields C. Bracher, T. Kramer, and J. Delos Phys. Rev. A, 73, 062114-1-21, (2006)