title: Equivalence principle and gravitational redshift.
abstract: We investigate leading order deviations from general relativity that violate the Einstein equivalence principle in the gravitational standard model extension. We show that redshift experiments based on matter waves and clock comparisons are equivalent to one another. Consideration of torsion balance tests, along with matter-wave, microwave, optical, and Mössbauer clock tests, yields comprehensive limits on spin-independent Einstein equivalence principle-violating standard model extension terms at the 10(-6) level.
authors.affiliation: Department of Physics, University of California, Berkeley, California 94720, USA. hohensee@berkeley.edu
authors.forename: Michael A
authors.initials: MA
authors.lastname: Hohensee
authors.forename: Steven
authors.initials: S
authors.lastname: Chu
authors.forename: Achim
authors.initials: A
authors.lastname: Peters
authors.forename: Holger
authors.initials: H
authors.lastname: Müller