Berlin 2014 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 32: Poster: Quantum gases, ultracold atoms and molecules

Q 32.82: Poster

Mittwoch, 19. März 2014, 16:30–18:30, Spree-Palais

Ultracold Rydberg Gases in the Millisecond Regime — •Torsten Manthey, Thomas Niederprüm, Tobias Weber, Oliver Thomas, and Herwig Ott — Research Center Optimas, Technische Universität Kaiserslautern, 67663 Kaiserslautern,

We present our recent results measured with an apparatus, which is a combination of the scanning electron microscopy technique with a high power laser system for the single photon excitation to Rydberg states. We show that the electron beam is a powerful tool to prepare distributions of mesoscopic samples which are smaller than the dipole-dipole interaction induced blockade radius. These samples show an anti-bunching in the ion rate under illumination of the UV laser which is an evidence for the production of so-called superatoms. We furthermore demonstrate that the interactions between fast electrons and highly excited atoms is extremely large due to l-changing collisions.