Degenerate Bose-Fermi mixtures of rubidium and ytterbium

Abstract

We report the first realization of a quantum degenerate mixture of bosonic ${}^{87}$Rb and fermionic ${}^{171}$Yb atoms in a hybrid optical dipole trap with a tunable, species-dependent trapping potential. ${}^{87}$Rb is shown to be a viable refrigerant for the non-interacting ${}^{171}$Yb atoms, cooling up to $2.4\times 10^5$ ${}^{171}$Yb atoms to a temperature of $T/T_F=0.16(2)$ while simultaneously forming a ${}^{87}$Rb BEC of $3.5\times 10^5$ atoms. Furthermore we demonstrate our ability to independently tailor the potentials for each species, which paves the way for studying impurities immersed in a Bose gas.

sumbitted to PRA 06-26-2015

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