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Q: Fachverband Quantenoptik und Photonik

Q 3: Precision Measurements and Metrology I

Q 3.2: Vortrag

Montag, 14. März 2022, 14:15–14:30, Q-H11

Gravitational Redshift Tests with Atomic Clocks and Atom Interferometers — •Fabio Di Pumpo¹, Christian Ufrecht¹, Alexander Friedrich¹, Enno Giese², Wolfgang P. Schleich^1,3, and William G. Unruh⁴ — ¹Institut für Quantenphysik and Center for Integrated Quantum Science and Technology (IQ^ST), Universität Ulm — ²Institut für Angewandte Physik, Technische Universität Darmstadt — ³Institute of Quantum Technologies, German Aerospace Center (DLR) — ⁴Department of Physics and Astronomy, University of British Columbia

Atomic interference experiments test the universality of the coupling between matter-energy and gravity at different spacetime points, thus probing 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. Consequently, we present a large class of atom-interferometer geometries which are sensitive to violations of UGR, and identify their underlying mechanisms leading to such tests [see PRX Quantum 2, 040333 (2021)].

The project “Metrology with interfering Unruh-DeWitt detectors” (MIUnD) is funded by the Carl Zeiss Foundation (Carl-Zeiss-Stiftung) through IQ^ST. The QUANTUS project is supported by the German Aerospace Center (DLR) with funds provided by the Federal Ministry of Economics and Technology (BMWi) due to an enactment of the German Bundestag under grant DLR 50WM1956 (QUANTUS V).