Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie
Q 57.97: Poster
Donnerstag, 17. März 2011, 16:30–19:30, P1
Cold Atom Sagnac Interferometer — •Sven Abend, Peter Berg, Michael Gilowski, Christian Schubert, Gunnar Tackmann, Wolfgang Ertmer, and Ernst M. Rasel — Institut für Quantenoptik, Leibniz Universität Hannover
The project CASI (Cold Atom Sagnac Interferometer) realizes an atomic gyroscope based on matter-wave interferometry with cold Rubidium-87 atoms to precisely measure rotations. The sensitivity of the sensor therefore reaches a resolution of few 10−7 rad/s. Besides the reduction of the dominant noise sources, the modification of the conventional Raman beam splitting process to large momentum transfer beam splitter is an approach to increase the sensitivity by enlarging the enclosed interferometric area. The transfer of many photon momenta onto the atomic ensemble is realized via a rapid adiabatic passage in an accelerated optical lattice of two counter propagating light fields. In this poster the first results of the application of large momentum beam splitters in the atomic gyroscope are presented. Furthermore, we report on the present status of the apparatus including the analysis of systematic effects, which lead to the current limitation of the sensor. Finally, future improvements based on the provided analysis of the sensor will be discussed. This work is supported by the DFG, QUEST, and IQS.