Atom interferometers can be used to perform accurate measurements of energy shifts or accelerations.  We are constructing a ytterbium atom interferometer to search for ultralight dark matter.  Our experiment will be sensitive to three generic signals:  variation of the fine-structure constant, differential acceleration between ytterbium isotopes, and spin torque. 

Our sensitivity projections for this project have been published in Physical Review A as "Ytterbium atom interferometry for dark matter searches" (Zhou, Ranson, Panagiotou, Overstreet).