Erlangen 2018 – scientific programme
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A: Fachverband Atomphysik
A 42: Poster Session IIIb
A 42.17: Poster
Thursday, March 8, 2018, 16:15–18:15, Zelt Ost
Observation of RbSr Feshbach resonances — •Florian Schreck1, Vincent Barbé1, Alessio Ciamei1, Lukas Reichsöllner1, Benjamin Pasquiou1, Jacek Szczepkowski2, Piotr Zuchowski3, and Jeremy Hutson4 — 1University of Amsterdam, The Netherlands — 2Polish Academy of Sciences, Warsaw, Poland — 3Nicolaus Copernicus University, Poland — 4Durham University, United Kingdom
We report the first observation of magnetic Feshbach resonances (FRs) between an alkali and a closed-shell atom, Rb and Sr [1]. In this system none of the strong coupling mechanisms that lead to broad FRs in alkali systems exist. Our work shows that weak coupling mechanisms, as predicted in [2], lead to narrow Rb-Sr Feshbach resonances. We also present spectroscopic studies of the RbSr ground-state potential, performed on several isotopic combinations. These studies enable us to predict the location and width of Feshbach resonances in all stable isotopic mixtures. We identify mixtures for which magnetoassociation of Rb and Sr atoms into molecules should be feasible despite the narrowness of the resonances. This opens a door towards the creation of open-shell, strongly polar molecules.
[1] V. Barbé et al., arXiv:1710.03093 (2017).
[2] P. Żuchowski et al., Phys. Rev. Lett. 105, 153201 (2010).