Düsseldorf 2007 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 33: Poster Präzisionsmessungen

Q 33.7: Poster

Dienstag, 20. März 2007, 16:30–18:30, Poster C

Cold Atom Sagnac Interferometer — •Thijs Wendrich, Michael Gilowski, Tobias Müller, Waldemar Herr, Cristian Schubert, Ernst M. Rasel, and Wolfgang Ertmer — Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover

The very high sensitivity of matter-wave interferometry for detecting accelerations and rotations has made it to an ideal tool for applications in fundamental physics and metrology [1]. We report on the status of our dual atom interferometer for the precise determination of inertial forces. In this project we use synchronous operation of two counterpropagating atominterferometers to discriminate between accelerations and rotations. The ensembles of 10µk cold ⁸⁷Rb atoms are launched with a velocity of about 4.4m/s from two double-mot sources on precisely controlled parabolas into the interferometer chamber. The interferometer itself uses optical Raman transitions for the coherent splitting of the atoms. This allows for a compact and transportable setup while still enabling sensitivities comparable to the best conventional sensors. In the current low resolution mode, we optimize critical interferometer components such as atom preparation and detection and analyse systematic effects. Finally we will present the scheme to upgrade the experiment to the full sensitivity of 2*10⁻⁹ rad/s for 1*10⁸ atoms per shot at a velocity of 3m/s. [1] C. Jentsch, T. Müller, E.M. Rasel, and W. Ertmer, Gen. Rel. Grav. 36(10), 2197(2004)