Erlangen 2018 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 49: Precision Measurements and Metrology (Atom Interferometry) (joint session Q/A)

Q 49.3: Talk

Wednesday, March 7, 2018, 14:45–15:00, K 2.013

New developments with the Gravimetric Atom Interferometer GAIN — •Bastian Leykauf¹, Anne Stiekel¹, Vladimir Schkolnik¹, Christian Freier¹, Hartmut Wziontek², Axel Rülke², Markus Krutzik¹, and Achim Peters¹ — ¹Institut für Physik, Humboldt-Universität zu Berlin — ²Bundesamt für Karthographie und Geodäsie (BKG)

GAIN uses the interference of cold atoms to precisely and accurately measure temporal changes in the gravitational acceleration [1].

In cooperation with the German Federal Agency for Cartography and Geodesy (Bundesamt für Karthographie und Geodäsie, BKG), we conducted a measurement campaign at the geodetic observatory in Wettzell. We will report on the results of this measurement campaign, including the study of active and passive vibration isolation strategies as well as common-mode noise suppression by differential gravity measurements using two atomic samples. We will furthermore discuss systematic effects in the measured gravity value caused by residual magnetic fields [2] and higher order light-shifts.
[1] Freier et al. Mobile quantum gravity sensor with unprecedented stability, Journal of Physics: Conference Series 723 (2016)
[2] Hu et al. Mapping the absolute magnetic field and evaluating the quadratic Zeeman-effect-induced systematic error in an atom interferometer gravimeter, Physical Review A 96, 033414 (2017)