Observation of Feshbach resonances in the collisions of ultracold lithium-6 and cesium-133 atoms

Heteronuclear mixtures provide new degrees of freedom for ultracold atom experiments. Among them, a fermionic $^6$Li - bosonic $^{133}$Cs mixture is an excellent candidate to explore new quantum phases, perform independent optical manipulations of the two species, and study universal few-body physics. Here we report the experimental and theoretical study of two-body interaction in this mixture. We identify five $s$-wave interspecies Feshbach resonances with a magnetic field below 1000G [1]. Finally, we report experimental progress toward dual quantum degeneracy of Li and Cs atoms.\\[4pt] [1] S. Tung, C. Parker, J. Johansen, C. Chin, Y. Wang, and P. Julienne, Phys. Rev. A 87, 010702(R) (2013).