Observation of Feshbach resonances between a single ion and ultracold atoms.

摘要: Controlling physical systems and their dynamics on the level of individual quanta propels both fundamental science quantum technologies. Trapped atomic molecular systems, neutral charged, are at forefront science. Their extraordinary control is evidenced by numerous applications in information processing metrology. Studying long-range interactions between these when combined a hybrid atom-ion trap has lead to landmark results. Reaching ultracold regime, however, where mechanics dominates interaction, e.g., giving access controllable scattering resonances, been elusive so far. Here we demonstrate Feshbach resonances ions atoms, using magnetically tunable $^{138}$Ba$^{+}$ $^{6}$Li atoms. We tune experimental parameters probe different interaction processes - first, enhancing three-body reactions related losses identify then making two-body dominant investigate ion's sympathetic cooling bath. Our results provide deeper insights into interactions, complex many-body simulation.