Freiburg 2024 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 15: Poster I

A 15.19: Poster

Dienstag, 12. März 2024, 17:00–19:00, Tent A

A High-Resolution Ion Microscope to Spatially Observe Ion-Rydberg Interactions — •Jennifer Krauter, Moritz Berngruber, Viraatt Anasuri, Óscar Andrey Herrera-Sancho, Ruven Conrad, Raphael Benz, Florian Meinert, Robert Löw, and Tilman Pfau — 5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany

We report on our recent studies on ion-Rydberg atom interactions performed in the ultra-cold quantum regime using a high-resolution ion microscope. This apparatus provides temporal and spatial imaging of charged particles with a resolution of 200 nm.

Ion-Rydberg atom pair-states on the one hand allow for the observation of collisional dynamics on steep attractive potential energy curves. Avoided crossings with high-l states can cause significant speed up in the dynamics which is dependent on the individual Landau-Zener probabilities. On the other hand, the avoided crossings also lead to potential wells that give rise to bound molecular states. These bound states between an ion and a Rydberg atom feature large bond length, which enable the direct observation of vibrational dynamics. In an effort to further understand the binding mechanism of the Ion-Rydberg atom molecule their lifetime is currently under investigation.

Keywords: Rydberg; Ion Rydberg collisions; Ion microscope; Ion Rydberg molecule