Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 27: Poster: Quantum Optics and Photonics II

Q 27.48: Poster

Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof

Setting up a transportable absolute quantum gravimeter — •Nina Grove, Maral Sahelgozin, Jonas Matthias, Matthias Gersemann, Sven Abend, Waldemar Herr, Wolfgang Ertmer, and Ernst M. Rasel — Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover

We report on the recent development of the Quantum Gravimeter QG-1; presenting the setup of the double MOT system consisting of a 2D⁺-MOT and a 3D mirror MOT. State of the art gravimeters based on laser cooled atoms are limited in accuracy due to the expansion of the thermal ensemble during the interrogation time of the interferometer. In order to minimize such uncertainties, the Quantum Gravimeter QG-1 is designed to use ultra-cold ⁸⁷Rb-atom samples generated by an atom-chip source. Aiming for high precision the following parameters should be achieved: (i) 1 Hz repetition rate (ii) drift-free longterm measurements with a bandwidth at mHz-level (iii) accurate measurement of local gravity below the µGal-level (10⁻⁸ ms⁻²).

This work is a collaboration with the Institut für Erdmessung (IfE) and supported by the Deutsche Forschungsgemeinschaft (DFG) in the scope of the SFB 1128 geo-Q.