Abstract
We report on an improved test of the Universality of Free Fall using a rubidium-potassium dual-species matter wave interferometer. We describe our apparatus and detail challenges and solutions relevant when operating a potassium interferometer, as well as systematic effects affecting our measurement. Our determination of the Eötvös ratio yields ηRb,K = −1.9 × 10−7 with a combined standard uncertainty of ση = 3.2 × 10−7.
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Contribution to the Topical Issue “Quantum Technologies for Gravitational Physics”, edited by Tanja Mehlstäubler, Yanbei Chen, Guglielmo M. Tino and Hsien-Chi Yeh.
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Albers, H., Herbst, A., Richardson, L.L. et al. Quantum test of the Universality of Free Fall using rubidium and potassium. Eur. Phys. J. D 74, 145 (2020). https://doi.org/10.1140/epjd/e2020-10132-6
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DOI: https://doi.org/10.1140/epjd/e2020-10132-6