Weekly TH Colloquium.
Abstract: Atomic physics has made rapid progress recently, yielding many high precision techniques and
experiments. Atom interferometry in particular has become a sensitive tool, used successfully for a variety
of applications including clocks, gyroscopes, and accelerometers. In light of this, it is interesting to consider
the possibilities for using atom interferometry to study fundamental physics. It could be applied to study
gravity and astrophysics by observing low frequency gravitational waves, or by allowing laboratory tests of
general relativity. Further, atom interferometry can make significant improvements to searches for new
short-distance forces and tests of atom neutrality. It could even potentially provide novel tests of