Erlangen 2018 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster: Quantum Optics and Photonics V

Q 62.35: Poster

Donnerstag, 8. März 2018, 16:15–18:15, Redoutensaal

Gravity sensing with Very Long Baseline Atom Interferometry — •Etienne Wodey¹, Manuel Schilling², Christian Meiners¹, Dorothee Tell¹, Dennis Schlippert¹, Christian Schubert¹, Ludger Timmen², Wolfgang Ertmer¹, Jürgen Müller², and Ernst M. Rasel¹ — ¹Institut für Quantenoptik, Leibniz Universität Hannover — ²Institut für Erdmessung, Leibniz Universität Hannover

Very Long Baseline Atom Interferometry (VLBAI) represents a new generation of atom interferometry based sensors aiming at measuring inertial forces and performing tests of fundamental physics with unprecedented resolution and accuracy. An extension of the baseline from tens of centimeters to over ten meters combined with novel seismic noise reduction systems puts sensitivities competing with those of superconducting gravimeters within reach, while keeping the stability and accuracy inherent to atomic sensors. Among other applications, next generation gravity reference stations can then be envisaged.

However, performing high-accuracy atom interferometry over such extended baselines poses severe challenges to the design of the apparatus. We focus in particular on our strategies to control magnetic and gravity fields along the baseline as well as reduce the seismic noise of the inertial reference. We also present the development of our source of ultracold ytterbium atoms which, thanks to its rich energy levels structure and outstanding magnetic properties in its electronic ground state opens further prospects for high-performance atom interferometry.

This work is supported by the CRCs 1128 geo-Q and 1227 DQ-mat.