Dual-species quantum degeneracy of 40K and 87Rb on an atom chip

In this article we review our recent experiments with a K-40-Rb-87 mixture. We demonstrate rapid sympathetic cooling of a K-40-Rb-87 mixture to dual quantum degeneracy on an atom chip. We also provide details on efficient BEC production, species-selective magnetic confinement, and progress toward integration of an optical lattice with an atom chip. The efficiency of our evaporation allows us to reach dual degeneracy after just 6 s of evaporation - more rapidly than in conventional magnetic traps. When optimizing evaporative cooling for efficient evaporation of Rb-87 alone we achieve BEC after just 4 s of evaporation and an 8 s total cycle time.