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A: Fachverband Atomphysik

A 11: Precision spectroscopy of atoms and ions III

A 11.3: Vortrag

Dienstag, 15. März 2011, 14:30–14:45, BAR 205

High resolution atom gyroscope — •Peter Berg, Sven Abend, Christian Schubert, Michael Gilowski, Wolfgang Ertmer, and Ernst Rasel — Institut für Quantenoptik, Universität Hannover

Atomic quantum sensors are a key-technology for the ultra-precise monitoring of accelerations and rotations, which make them an ideal tool for applications in fundamental physics and metrology. In the reasearch project CASI (Cold Atom Sagnac Interferometer) an atomic gyroscope based on matter-wave interferometry is realized to measure rotations and accelerations. In order to distinguish between them, the apparatus uses two counterpropagating interferometers in a differential measurement scheme. The atomic ensembles are launched simultaneously in a pulsed mode onto flat parabolas with a forward drift velocity of 2,79 m/s. In three spatially separated interaction zones coherent beam splitting processes are realized by using Raman transitions. In this way, various interferometer configurations enclosing areas of several mm² can be tested. In this talk we discuss the influence of the main noise sources which currently limit the sensitivity of our atomic gyroscope to a few 10⁻⁷ rad/s. In this context, the latest interferometric measurements and future improvements of the sensor based on the provided analysis will be presented. This work is supported by the DFG, QUEST, and IQS.