Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 37: Precision Measurements and Metrology II
Q 37.5: Vortrag
Mittwoch, 13. März 2019, 15:00–15:15, S SR 111 Maschb.
Characterisation of a high-flux BEC source for gravity measurements on the 10−9m s−2 inaccuracy level — •Nina Heine1, Jonas Matthias1, Maral Sahelgozin1, Waldemar Herr1, Ludger Timmen2, Jürgen Müller2, and Ernst M. Rasel1 — 1Institute of Quantum Optics, Hannover, Germany — 2Institut für Erdmessung, Hannover, Germany
Inertial sensors based on the principle of atom interferometry will benefit in accuracy from employing Bose-Einstein condensates (BECs) as test masses.
Leading order uncertianties occuring in cold atom gravimeters due to wavefront abberations and the Coriolis force are inherently supressed by the almost vanishing expansion rate of a delta-kick collimated BEC. Further the per-shot sensitivity will be increased by a gain in interferometer contrast and the implementation of higher order momentum transfer for Bragg interferometry. Exploiting these advantages in a transportable sensor requires a compact and robust setup allowing for high repetition rates. For the Quantum Gravimeter QG-1 this is realised in a double magneto-optical trap configuration based on an atom chip.
This talk focuses on the characterisation of the BEC source for the transportable Quantum Gravimeter QG-1 and highlights the way towards the so far unexplored 10−9m s−2 inaccuracy regime.
This work is supported by the Deutsche Forschungsgemeinschaft (DFG) as part of project A01 within the SFB 1128 geo-Q.