Feshbach spectroscopy of an ultracold mixture of ${}^{85}$Rb and ${}^{133}$Cs

Hung-Wen Cho, Daniel J. McCarron, Michael P. Koppinger +7

We report the observation of interspecies Feshbach resonances in an optically trapped mixture of ${}^{85}$Rb and ${}^{133}$Cs. We measure 14 interspecies features in the lowest spin ch…