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Hannover 2010 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 7: Precision Measurements and Metrology I

Q 7.7: Vortrag

Montag, 8. März 2010, 15:30–15:45, M 11

High precision cold atom gyroscope — •Christian Schubert, Sven Abend, Peter Berg, Timo Denker, Michael Gilowski, Gunnar Tackmann, Wolfgang Ertmer, and Ernst Rasel — Institut für Quantenoptik, Leibniz Universität Hannover

Due to its high potential, matter wave interferometry has been investigated as a tool for high precision inertial measurements for years. The research topic of the CASI project (Cold Atom Sagnac Interferometer) is a gyroscope using laser cooled Rubidium atoms and aiming for a sensitivity of a few 10−9 rad/s/Hz1/2 for 108 atoms per shot. The atomic ensemble is launched in a pulsed mode onto a flat parabola with a forward drift velocity of 2,79 m/s leading to an interrogation time of over 50 ms. Via coherent beamsplitting using Raman transitions, the atomic trajectories forming the interferometer paths can enclose an area of several mm2. In this talk we discuss the influence of the main noise sources which limit the sensitivity of our quantum sensor. Particularly, contributions affecting the beam splitting process as well as the detection will be considered. Furthermore, the lastest interferometry measurements will be presented. This work is supported by the DFG, QUEST, and IQS.

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