Progress of the JILA electron EDM experiment

A nonzero permanent electric dipole moment of the electron (eEDM) would have important implications for extensions to the Standard Model of particle physics. The JILA eEDM experiment uses trapped HfF$^+$ ions to attain large effective electric fields and long measurement coherence times. In our ion trap we prepare HfF$^+$ in a low-lying, metastable $^3\Delta_1$ state and perform Ramsey spectroscopy between two Zeeman sub-levels in the presence of rotating electric and magnetic bias fields with free-evolution times of $>$ 500 ms. Using this technique, we have thoroughly investigated sources of systematic error and have recently suppressed several of our leading systematics to the $10^{-30}$ $e\cdot$cm level. Here, we present the results from our systematic error investigations and from a high-precision eEDM-sensitive 100-hour data run.