Observation of broad p-wave Feshbach resonances in ultracold ${}^{85}$Rb-${}^{87}$Rb mixtures

Abstract

We observe new Feshbach resonances in ultracold mixtures of ${}^{85}$Rb and ${}^{87}$Rb atoms in the ${}^{85}$Rb$|2,+2⟩$+${}^{87}$Rb$|1,+1⟩$ and ${}^{85}$Rb$|2,-2⟩$+${}^{87}$Rb$|1,-1⟩$ scattering channels. The positions and properties of the resonances are predicted and characterized using the semi-analytic multichannel quantum-defect theory by Gao. Of particular interest, a number of broad entrance-channel dominated p-wave resonances are identified, implicating exciting opportunities for studying a variety of p-wave interaction dominated physics.

arXiv comment7 pages, 6 figures

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