Quantum test of the Universality of Free Fall using rubidium and potassium

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...

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Bibliographic Details
Published in:The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2020-07, Vol.74 (7), Article 145
Main Authors: Albers, Henning, Herbst, Alexander, Richardson, Logan L., Heine, Hendrik, Nath, Dipankar, Hartwig, Jonas, Schubert, Christian, Vogt, Christian, Woltmann, Marian, Lämmerzahl, Claus, Herrmann, Sven, Ertmer, Wolfgang, Rasel, Ernst M., Schlippert, Dennis
Format: Article
Language:English
Subjects:
Applications of Nonlinear Dynamics and Chaos Theory
Atomic
Free fall
Matter waves
Molecular
Optical and Plasma Physics
Physical Chemistry
Physics
Physics and Astronomy
Potassium
Quantum Information Technology
Quantum Physics
Regular Article
Rubidium
Spectroscopy/Spectrometry
Spintronics
Topical Issue: Quantum Technologies for Gravitational Physics
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Summary: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 η Rb,K  = −1.9 × 10 −7 with a combined standard uncertainty of σ η   = 3.2 × 10 −7 . Graphical abstract
ISSN:1434-6060
1434-6079
DOI:10.1140/epjd/e2020-10132-6