# Quantum Degenerate Mixtures of Alkali and Alkaline-earth-like Atoms

 Title: Quantum Degenerate Mixtures of Alkali and Alkaline-earth-like Atoms Author: Hara, Hideaki; Takasu, Yosuke; Yamaoka, Yoshifumi; Takahashi, Yoshiro; Doyle, John M. Note: Order does not necessarily reflect citation order of authors. Citation: Hara, Hideaki, Takasu, Yosuke, Yamaoka, Yoshifumi, Doyle, John, and Yoshiro Takahashi. 2011. Quantum degenerate mixtures of alkali and alkaline-earth-like atoms. Physical Review Letters 106(20): 205304. Full Text & Related Files: 1104.4430v2.pdf (283.1Kb; PDF) Abstract: We realize simultaneous quantum degeneracy in mixtures consisting of the alkali and alkalineearth-like atoms Li and Yb. This is accomplished within an optical trap by sympathetic cooling of the fermionic isotope $$^6$$Li with evaporatively cooled bosonic $$^{174}$$Yb and, separately, fermionic $$^{173}$$Yb.Using cross-thermalization studies, we also measure the elastic s-wave scattering lengths of both Li-Yb combinations, $$|a_{6_{Li}-174_{Yb}}|$$ = 1.0$$\pm$$0.2 nm and $$|a_{6_{Li}-173_{Yb}}|$$ = 0.9$$\pm$$0.2 nm. The equality of these lengths is found to be consistent with mass-scaling analysis. The quantum degenerate mixtures of Li and Yb, as realized here, can be the basis for creation of ultracold molecules with electron spin degrees of freedom, studies of novel Efimov trimers, and impurity probes of superfluid systems. Published Version: doi://10.1103/PhysRevLett.106.205304 Other Sources: http://arxiv.org/abs/1104.4430v2 Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:10591634 Downloads of this work: