Hannover 2013 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 35: Poster I
Q 35.74: Poster
Tuesday, March 19, 2013, 16:00–18:30, Empore Lichthof
CASI Cold Atom Gyroscope Experiment — •Sven Abend, Peter Berg, Gunnar Tackmann, Katja Baxmann, Teresa Feld, Paul Kaebert, Christian Schubert, Wolfgang Ertmer, and Ernst M. Rasel — Institut für Quantenoptik, Leibniz Universität Hannover
We report on recent progress of the Cold Atom Sagnac Interferometer (CASI) experiment at Leibniz Universtity of Hannover. This experiment demonstrates the use of cold atomic ensembles to measure ultra-slow rotations via the Sagnac effect with a sensitivity of 5.3 10−7rad/s. Atomic superposition states enclose areas as large as 19 mm2 on a rather short baseline of 13.7 cm. We present several methods of modulating the interferometric phase via the reference mirrors and therefore a precise tool to compensate drift behaviours of the sensor. A careful analysis should allow to overcome our current limitation of 3 10−8rad/s and to measure Earth’s rotation rate at the 10−9 rad/s level. This work is supported by the DFG, the cluster of excellence QUEST, and IQS.