Lattice interferometry in an optical cavity

Optical cavities have attracted interest for use in atom interferometers, in hopes that the pristine cavity mode wavefronts would enable reliable matter wave manipulations. In particular, a spatially-separated atomic wavefunction could be held in an optical lattice for long durations, boosting interferometer sensitivity. In this talk, I will present our realization of a trapped atom interferometer inside an optical cavity. The cavity's high quality wavefronts allow interferometer durations an order of magnitude longer than any previously demonstrated. I will present experimental results, and discuss exciting aspects of our interferometer geometry.