Darmstadt 2008 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 44: Quanteneffekte (Interferenz / Sonstige)
Q 44.4: Vortrag
Donnerstag, 13. März 2008, 14:45–15:00, 2D
Microwave driven Rydberg atoms: from strong localization to single-photon ionization — •Alexej Schelle1,2, Andreas Buchleitner2, and Dominique Delande1 — 1Laboratoire Kastler Brossel, 4, place Jussieu, F-75252 Paris, cedex 05 — 2Institute of Physics, Department for Quantum Optics and Statistics, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg
We study the atomic counterpart of Anderson localization in atomic driven Rydberg systems. By switching the initial Rydberg state from lower bound states, where destructive quantum interference suppresses the classically predicted ionization threshold, up to the single-photon absorption limit, we observe a transition in the scaling behavior of the ionization threshold field. Unlike in the strong localization regime, where the scaled ionization threshold shows a smooth and universal behavior for hydrogen and lithium atoms, strong oscillations in the few-photon absorption limit indicate the breakdown of the Anderson localization scenario.