Darmstadt 2008 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 13: Posters: Photoionization and atomic systems in external fields

A 13.8: Poster

Dienstag, 11. März 2008, 16:30–18:30, Poster C3

Calculation of Berry phases emerging in atomic beam spin echo experiments — •Martin-Isbjörn Trappe, Thomas Gasenzer, and Otto Nachtmann — Institut für Theoretische Physik, Philosophenweg 16, 69120 Heidelberg

We consider the derivation of geometrical phase factors in longitudinal atomic beam spin echo (lABSE) experiments. The propagation of hydrogen like atoms in stationary electric and magnetic fields leads to geometrical phases in addition to the common dynamical phase factors. We provide numerical calculations of parity conserving as well as parity violating contributions to the geometrical phases depending on the electromagnetic field configuration and the initial superposition of the atomic eigenstates. The conditions for suitable configurations of lABSE experiments for measuring Berry phases in hydrogen are investigated.