Mainz 2017 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 21: Precision Measurements and Metrology: Interferometry I

Q 21.2: Talk

Tuesday, March 7, 2017, 11:15–11:30, P 104

Operating an interferometer in a noisy environment — •Dipankar Nath, Henning Albers, Christian Meiners, Logan L. Richardson, Dennis Schlippert, Christian Schubert, Etienne Wodey, Wolfgang Ertmer, and Ernst M. Rasel — Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover

Inertial sensitive devices such as atom interferometers are prone to seismic noise. Atom interferometers with longer baselines are particularly susceptible to very low frequency noise where vibration isolation platforms are not very efficient. Using a mechanical sensor like a seismometer, one can correct the contribution from residual vibrations [1]. We demonstrate seismic post correction in an atom interferometer with 2T=152 ms by correlating the atom interferferometer (operated using cold ⁸⁷Rb atoms) with a Guralp CMG-40T seismometer and show a two fold improvement in the short term stability using the post correction scheme. Such a scheme will also be implemented in the Very Long Baseline Atom interferometer (VLBAI) [2]. Seismic post correction will also be used to improve the test of the Universality of Free Fall in a dual species atom interferometer employing ⁸⁷Rb and ³⁹K as test masses [3,4]. Post correction schemes such as this will also be used in atom interferometry based transportable gravimeters in the future.

[1] L. Le Gouët et al., Appl. Phys. B 92, 133 (2008)

[2] J. Hartwig et al., New J. Phys. 17, 035011 (2015)

[3] D. Schlippert et al., Phys. Rev. Lett. 112, 203002 (2014)

[4] B. Barrett et. al., arXiv 1609.03598v1