Second-generation strontium molecular lattice clock

The relatively simple molecular structure, insensitivity to external fields, and existence of narrow transitions in Sr₂ make it an attractive platform for a molecular clock. Exploiting these features, we plan to perform an isotope shift measurement to constrain fifth forces acting at the nanometer length scale. In pursuit of this measurement, we are constructing a second-generation Sr₂ molecular lattice clock designed to improve upon prior limitations. These improvements address several factors limiting the trapped-molecule coherence time, as well as increase the atomic flux, to help reach a high precision on isotope shift measurements with the less abundant isotopes.