2007/12/31 by J. J. Zirbel, Kang-Kuen Ni, K. -K. Ni +13 · 5 citations
Physics and Astronomy · #Advanced Frequency and Time Standards #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #cond-mat.other
paper · pdf · doi:10.1103/physreva.78.013416
published as Phys. Rev. A 78, 013416 (2008) · 7 pages, 7 figures
openalex publication_date 2008/07/23 · arxiv created 2008/08/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report on the creation and characterization of heteronuclear 40K87Rb Feshbach molecules in an optical dipole trap. Starting from an ultracold gas mixture of 40K and 87Rb atoms, we create as many as 25 000 molecules at 300 nK by rf association. Optimizing the association process, we achieve a conversion efficiency of 25%. We measure the temperature dependence of the rf association process and find good agreement with a phenomenological model that has previously been applied to Feshbach molecule creation by slow magnetic-field sweeps. We also present a measurement of the binding energy of the heteronuclear molecules in the vicinity of the Feshbach resonance and provide evidence for Feshbach molecules as deeply bound as 26 MHz.