Hannover 2013 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

Q: Fachverband Quantenoptik und Photonik

Q 56: Poster III

Q 56.40: Poster

Donnerstag, 21. März 2013, 16:00–18:30, Empore Lichthof

Coherent excitation of interacting Rydberg gases at room temperature — •Andreas Kölle, Bernhard Huber, Thomas Baluktsian, Robert Löw, and Tilman Pfau — 5. Physikalisches Institut, Universität Stuttgart

Glass cells filled with thermal rubidium vapor are proposed to be promising candidates for a large variety of quantum devices. These devices are based on a long range Rydberg-Rydberg interaction which has been demonstrated in various ultra cold experiments. In order to translate these results to a hot ensemble of atoms, effects like reduced life time and atomic motion have to be taken into account.

We present evidence for van-der Waals interaction between Rydberg atoms in thermal vapor. Using a pulsed two-photon excitation scheme on the ns time scale we overcome problems of thermal motion on the order of the interaction length and limited coherence time. The resulting Rabi oscillations are compared to a simple 3 - level single atom model including a dephasing due to the Rydberg-Rydberg interaction.

In addition we present results on merging the pulsed excitation with a four-wave-mixing scheme resulting in a pulsed coherent light source. Our progress towards the creation of non classical light based on Rydberg interaction will be shown.