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Q: Fachverband Quantenoptik und Photonik

Q 7: Ultracold plasmas and Rydberg systems I (with A)

Q 7.4: Talk

Monday, March 17, 2014, 11:15–11:30, DO24 1.101

Millisecond Dynamics of Mesoscopic Rydberg Samples — •Thomas Niederprüm, Tobias Weber, Torsten Manthey, Oliver Thomas, and Herwig Ott — Research Center Optimas, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany

A long standing but not yet fully achieved goal in the field of ultracold atoms consists in establishing longe-range interactions between the atoms. Several proposals have demonstrated that dressing ultracold atoms with highly excited Rydberg states is a promising scheme to tailor such interactions. The timescale for such experiments would be in the millisecond range, where thermal motion, heating, decay, ionization and decoherence phenomena are present. While the short time behavior of cold Rydberg gases, the so called frozen Rydberg gas, has been vastly studied in the past only little work has been done to understand the long time behavior of Rydberg excitations in cold atomic gases. This talk will show how we use the arising ion signal as a continuous probe for the Rydberg population in atomic samples. Furthermore the observed ion signal can reveal temporal correlations in the excited sample. Recent experiments on the excitation dynamics of Rydberg samples of intermediate size are presented and evidence for strongly correlated behaviour of Rydberg excitations will be shown.