UGR tests with atomic clocks and atom interferometers

TL;DR

This paper discusses testing the universality of gravitational redshift using atomic clocks and atom interferometers, introducing a violation model and analyzing various geometries sensitive to such violations.

Contribution

It presents a unified framework for UGR tests with atomic clocks and atom interferometers, including a new violation model and geometries sensitive to UGR violations.

Findings

Proposes a comprehensive model for UGR violations.

Identifies atom-interferometric geometries sensitive to violations.

Unifies analysis of clock and interferometer tests.

Abstract

Atomic interference experiments test the universality of the coupling between matter-energy and gravity at different spacetime points, thus being in principle able to probe possible violations of the universality of the gravitational redshift (UGR). In this contribution, we introduce a UGR violation model and then discuss UGR tests performed by atomic clocks and atom interferometers on the same footing. We present a large class of atom-interferometric geometries which are sensitive to violations of UGR.