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Freiburg 2024 – scientific programme

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A: Fachverband Atomphysik

A 25: Poster IV

A 25.6: Poster

Wednesday, March 13, 2024, 17:00–19:00, Tent A

Collisional energy effects on atom-ion Feshbach resonances — •Joachim Siemund1, Fabian Thielemann1, Daniel Hönig1, Wei Wu1, Krzysztof Jachymski2, Thomas Walker1,3, and Tobias Schätz11Physikalisches Institut, Albert-Ludwigs Universität Freiburg — 2Faculty of Physics, University of Warsaw — 3Blackett Laboratory, Imperial College, London

We investigate the inelastic loss dynamics around Feshbach resonances between neutral atoms and ions depending on the collision energy. By immersing a single 138Ba+ ion in an ultracold cloud of 6Li, we have demonstrated the enhancement of two- and three-body interactions through changes in the ion’s electronic state and radial kinetic energy. We probe the atom-ion interaction rate while tuning the ion’s kinetic energy and atomic cloud temperature. We observe the enhancement and suppression of inelastic loss processes depending on the collision energies and specific Feshbach resonance. This energy dependence could provide insight into the fundamental nature of the interaction dynamics, which also will be discussed in a parallel talk by Fabian Thielemann.

Keywords: Fano-Feshbach; Ultracold; Barium; Lithium; Hybrid

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