Accurate near-threshold model for ultracold KRb dimers from interisotope Feshbach spectroscopy

Abstract

We investigate magnetic Feshbach resonances in two different ultracold K-Rb mixtures. Information on the K(39)-Rb(87) isotopic pair is combined with novel and pre-existing observations of resonance patterns for K(40)-Rb(87). Interisotope resonance spectroscopy improves significantly our near-threshold model for scattering and bound-state calculations. Our analysis determines the number of bound states in singlet/triplet potentials and establishes precisely near threshold parameters for all K-Rb pairs of interest for experiments with both atoms and molecules. In addition, the model verifies the validity of the Born-Oppenheimer approximation at the present level of accuracy.

9 pages, 7 figures

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Cited by in corpus (8)

• Double species condensate with tunable interspecies interactions
• Observation of heteronuclear atomic Efimov resonances
• Association of ultracold double-species bosonic molecules
• Feshbach resonances in an ultracold ${}^7$Li and ${}^{87}$Rb mixture
• Feshbach resonances in ultracold atom-molecule collisions
• Predicting scattering properties of ultracold atoms: adiabatic accumulated phase method and mass scaling
• Phase Separation in two-Species Atomic Bose-Einstein Condensate with Interspecies Feshbach Resonance
• Collisional and molecular spectroscopy in an ultracold Bose-Bose mixture