Accounting for Confinement Shifts on the Binding Energies of 39K Feshbach Molecules

Le résumé fourni par la source

Ultracold 39K gases provide an ideal platform to study quantum few- and many-body systems, due to the high degree of control present in these systems. In particular, Feshbach resonances facilitate a magnetically tunable interaction strength between the atoms in the gas, and allow the formation of two- and three-body bound states, called Feshbach molecules and Efimov trimers respectively. Radio-frequency dissociation spectroscopy of weakly bound Feshbach molecules is one of the most precise ways to characterize the properties of a Feshbach resonance. We apply a numerical method to our Feshbach molecule binding energy data to compute the shift in the molecule’s binding energy due to the presence of a confining potential. These simulations are first used to replicate the confinement shift found for 6Li Feshbach molecules by another group, and then to correct our measurement results for the binding energy of 39K Feshbach molecules. The correction of these measurements is necessary for our determination of the Feshbach resonance location with unprecedented accuracy.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.