Near-threshold model for ultracold KRb dimers from interisotope Feshbach spectroscopy

2008/03/05 by A. Simoni, Andrea Simoni, M. Zaccanti +8 · 4 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #cond-mat.other

paper · pdf · doi:10.1103/physreva.77.052705

9 pages, 7 figures

arxiv created 2008/03/05 · openalex publication_date 2008/05/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We investigate magnetic Feshbach resonances in two different ultracold K-Rb mixtures. Information on the ³⁹K\text\ensuremath-⁸⁷Rb isotopic pair is combined with preexisting observations of resonance patterns for ⁴⁰K\text\ensuremath-⁸⁷Rb. 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 and 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.

Citations

• K<mml:none/><mml:none/><mml:mprescripts/><mml:none/>40−Rb<mml:none/><mml:none/><mml:mprescripts/><mml:none/>87Feshbach resonances: Modeling the interatomic potential
• High-precision calculations of van der Waals coefficients for heteronuclear alkali-metal dimers
• Scattering Length Scaling Laws for Ultracold Three-Body Collisions
• Observation of Bose-Einstein Condensation of Molecules

Cited by

• Quantum phase transitions in bosonic heteronuclear pairing Hamiltonians
• Phase separation in a two-species atomic Bose-Einstein condensate with an interspecies Feshbach resonance
• Feshbach resonances in ultracold gases
• Double Species Bose-Einstein Condensate with Tunable Interspecies Interactions

Related

• K<mml:none/><mml:none/><mml:mprescripts/><mml:none/>40−Rb<mml:none/><mml:none/><mml:mprescripts/><mml:none/>87Feshbach resonances: Modeling the interatomic potential
• Tunable Feshbach resonances in collisions of ultracold molecules in ²Σ states with alkali-metal atoms
• Long-range states and Feshbach resonances in collisions between ultracold alkali-metal diatomic molecules and atoms
• Observation of Feshbach resonances between alkali and closed-shell atoms
• Scattering of ultracold molecules in the highly resonant regime