Light propagation and atom interferometry in gravity and dilaton fields

Dark matter or violations of the Einstein equivalence principle influence motion atoms, their internal states as well electromagnetic fields, thus causing a signature in signal atomic detectors. To model such new physics, we introduce dilaton fields and study modified propagation light used to manipulate atoms light-pulse atom interferometers. Their interference is dominated by matter's coupling gravity dilaton. Even though field contributes phase, no additional dilaton-dependent effect can be observed. However, light's enters via momentum transfer its finite speed. For illustration, discuss effects from on different atom-interferometric setups, including gradiometers, tests, dark detection.