Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 40: Precision Measurements and Metrology (Atom Interferometry)
Q 40.3: Talk
Thursday, March 12, 2020, 11:45–12:00, a310
Atom interferometry in the transportable Quantum Gravimeter QG-1 — •Nina Heine1, Jannik Wesche1, Sven Abend1, Waldemar Herr1, Jürgen Müller2, and Ernst M. Rasel1 — 1Leibniz Universität Hannover, Institut für Quantenoptik, Hannover, Germany — 2Leibniz Universität Hannover, Institut für Erdmessung, Hannover, Germany
The transportable Quantum Gravimeter QG-1 will perform absolute measurements of the local gravitaional accelaration with an unrivalled uncertainty below 3 nm/s2 by utilising collimated atomic ensembles for atom interferometry in a compact setup. To achieve this performance, leading order error sources, predominantly stemming from the horizontal velocity of the interrogated atoms, need to be minimised. This talk elaborates on the design and implementation of the interferometry setup into the atom chip based experimental system. The center of mass motion and the velocity spread of the atomic cloud, as well as their impact on the beam splitting process are evaluated to develop a comprehensive understanding of their contribution to the uncertainty.
We acknowledge financial support from "Niedersächsisches Vorab" through "Förderung von Wissenschaft und Technik in Forschung und Lehre" for the initial funding of research in the new DLR-SI Institute and by the Deutsche Forschungsgemeinschaft (DFG) in the project A01 of the SFB 1128 geo-Q and under Germany’s Excellence Strategy - EXC 2123 QuantumFrontiers, Project-ID 390837967.