Abstract
Magnetic Feshbach resonances have allowed great success in the production of ultracold diatomic molecules from bi-alkali mixtures, but have so far eluded observation in mixtures of alkali and alkaline-earth-like atoms. Inelastic collisional properties of ultracold atomic systems exhibit resonant behavior in the vicinity of such resonances, providing a detection signature. We study magnetic field dependent inelastic effects via atom loss spectroscopy in an ultracold heteronuclear mixture of alkali 6Li in the ground state and alkaline-earth-like 174Yb in an excited electronic metastable state (3P2, ). We observe a variation of the interspecies inelastic two-body rate coefficient by nearly one order of magnitude over a 100–520 G magnetic field range. By comparing to ab initio calculations we link our observations to interspecies Feshbach resonances arising from anisotropic interactions in this novel collisional system.
Highlights
May 2015William Dowd, Richard J Roy, Rajendra K Shrestha, Alexander Petrov, Constantinos Makrides, Svetlana Kotochigova and Subhadeep Gupta
The ground electronic doublet-sigma (2Σ ) state of a diatomic molecule composed of an alkali and an alkalineearth-like atom is endowed with an unpaired electron
Recent theoretical studies indicate that Feshbach resonances between the ground states of alkali and alkaline-earth-like atoms are extremely narrow and located at inconveniently high fields [12]
Summary
William Dowd, Richard J Roy, Rajendra K Shrestha, Alexander Petrov, Constantinos Makrides, Svetlana Kotochigova and Subhadeep Gupta.
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