Manipulation of ultracold atomic mixtures using microwave techniques

Abstract We used microwave radiation to evaporatively cool a mixture of of 133 Cs and 87 Rb atoms in a magnetic trap. A mixture composed of an equal number (around 10 4 ) of Rb and Cs atoms in their doubly polarized states at ultracold temperatures was prepared. We also used microwaves to selectively evaporate atoms in different Zeeman states.