https://doi.org/10.1140/epjd/e2020-10132-6
Regular Article
Quantum test of the Universality of Free Fall using rubidium and potassium★
1
Leibniz Universität Hannover, Institut für Quantenoptik, Welfengarten 1, 30167 Hannover, Germany
2
College of Optical Sciences, University of Arizona, Tucson, AZ 85721, USA
3
ZARM Zentrum für angewandte Raumfahrttechnologie und Mikrogravitation, Universität Bremen, Am Fallturm 2, 28359 Bremen, Germany
a e-mail: schlippert@iqo.uni-hannover.de
Received:
2
March
2020
Received in final form:
22
May
2020
Published online:
7
July
2020
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.
© The Author(s) 2020. This article is published with open access at Springerlink.com
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Open access funding provided by Projekt DEAL.
