We report on the creation and characterization of heteronuclear $^{40}\text{K}^{87}\text{R}\text{b}$ Feshbach molecules in an optical dipole trap. Starting from an ultracold gas mixture of $^{40}\text{K}$ and $^{87}\text{R}\text{b}$ 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.We report on the creation and characterization of heteronuclear $^{40}\text{K}^{87}\text{R}\text{b}$ Feshbach molecules in an optical dipole trap. Starting from an ultracold gas mixture of $^{40}\text{K}$ and $^{87}\text{R}\text{b}$ 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.

arXiv:0712.3889Physical Review AJul 23, 2008120 citations

Observation of ultracold ground-state heteronuclear molecules

Gustavo Deczka Telles, M. Mancini, Anderson R. L. Caires +2 more

Verhandlungen der Deutschen Physikalischen GesellschaftJan 1, 20040 citations

Ultracold Heteronuclear Molecules in a 3D Optical Lattice

C. Ospelkaus, Silke Ospelkaus, Leif Humbert +3 more

We report on the creation of ultracold heteronuclear molecules assembled from fermionic 40K and bosonic 87Rb atoms in a 3D optical lattice. Molecules are produced at a heteronuclear Feshbach resonance on both the attractive and the repulsive sides of the resonance. We precisely determine the binding energy of the heteronuclear molecules from rf spectroscopy across the Feshbach resonance. We characterize the lifetime of the molecular sample as a function of magnetic field and measure lifetimes between 20 and 120 ms. The efficiency of molecule creation via rf association is measured and is found to decrease as expected for more deeply bound molecules.We report on the creation of ultracold heteronuclear molecules assembled from fermionic 40K and bosonic 87Rb atoms in a 3D optical lattice. Molecules are produced at a heteronuclear Feshbach resonance on both the attractive and the repulsive sides of the resonance. We precisely determine the binding energy of the heteronuclear molecules from rf spectroscopy across the Feshbach resonance. We characterize the lifetime of the molecular sample as a function of magnetic field and measure lifetimes between 20 and 120 ms. The efficiency of molecule creation via rf association is measured and is found to decrease as expected for more deeply bound molecules.

arXiv:cond-mat/0607581Physical Review LettersSep 18, 2006328 citations

Ultracold Heteronuclear Mixture of Ground and Excited State Atoms

William H. Dowd, Richard Roy, Rajendra K. Shrestha +2 more

Bulletin of the American Physical SocietyMay 2, 20140 citations

Theory of ultracold heteronuclear polar molecules

John L. Bohn

Bulletin of the American Physical SocietyMar 22, 20110 citations

We report on the creation and characterization of heteronuclear

^{40}\text{K}^{87}\text{R}\text{b}

Feshbach molecules in an optical dipole trap. Starting from an ultracold gas mixture of

^{40}\text{K}

and

^{87}\text{R}\text{b}

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.