Beyond Born-Oppenheimer approximation in ultracold atomic collisions

Year: 2020

Authors: Tiemann E., Gersema P., Voges K. K., Hartmann T., Zenesini A., Ospelkaus S.

Autors Affiliation: Institut für Quantenoptik, Leibniz Universität Hannover, 30167 Hannover, Germany

Abstract: We report on deviations beyond the Born-Oppenheimer approximation in potassium interatomic potentials. Identifying three previously unknown d-wave Feshbach resonances, we significantly improve the understanding of the 39K interatomic potentials. Combining these observations with the most recent data on known inter- and intraisotope Feshbach resonances, we show that Born-Oppenheimer corrections can be determined from atomic collisional properties alone and that significant differences between the homo- and heteronuclear cases appear.


Volume: 2      Pages from: 013366-1  to: 013366-10

KeyWords: Born Oppenheimer approximation, ultracold atoms, potassium, Feshbach resonances
DOI: 10.1103/PhysRevResearch.2.013366