Atom chip-based ultracold potassium for microwave and radio-frequency potentials

We present progress on an experiment to manipulate and trap ultracold atoms with microwave and radio-frequency ($\mu $/RF) AC Zeeman potentials produced with an atom chip. These $\mu $/RF potentials are well suited for atom interferometry and spin-dependent trapping for 1D many-body physics studies due to their compatibility with magnetic Feshbach resonances for tuning interactions. Calculations show that $\mu $/RF potentials are expected to significantly suppress the inherent atom chip roughness associated with DC magnetic potentials. We have assembled a dual species, dual chamber apparatus that produces ultracold $^{39}$K samples and $^{87}$Rb Bose-Einstein condensates on an RF-capable atom chip, with access to other isotopes. On-chip $^{39}$K will be sympathetically cooled through the microwave evaporation of rubidium, and transferred to a co-located dipole trap for a series of spatial manipulation experiments to study the capabilities and performance of $\mu $/RF potentials.