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A: Fachverband Atomphysik

A 22: Poster Session - Atomic Physics III

A 22.7: Poster

Mittwoch, 11. März 2020, 16:00–18:00, Empore Lichthof

Ultracold ytterbium Rydberg states in electric fields — Christian Halter, •Alexander Miethke, and Axel Görlitz — Heinrich-Heine-Universität, Düsseldorf, Deutschland

In recent years Rydberg atoms with their special features, like dipole-dipole interaction or van-der-Waals blockade, have become more and more important for quantum optics. Particularly ultra cold Rydberg atoms are of great interest for the investigation of long range interaction.

A special feature of ytterbium is that due to its two valance electrons atoms in Rydberg state can be easily manipulated and imaged using optical fields. A first step towards studies of ultra cold ytterbium is to gain precise knowledge on the Rydberg states.

Here we present the study of ultra cold ytterbium Rydberg states using traploss spectroscopy as well as direct ion detection. For the ion detection we are exciting atoms in a MOT to states of high principal quantum numbers n (n=30-90), followed by a short high voltage pulse. Making use of the variable delay between the excitation and ionization, information about the lifetimes of Rydberg states can be found. Additionally, by changing the high-voltage pulse the ionization threshold can be investigated. Various dependencies can be compared to theoretical quantum models.