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Springer proceedings in physics

Towards a Cold-Atom Matter-Wave Interferometer

Peter Hannaford, Russell McLean, G. I. Opat, W J Rowlands, Andrei I. Sidorov

Published Jan 1, 1994• 1 citation
Publisher
DOI
10.1007/978-3-642-79101-7_3

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European Quantum Electronics Conference (EQEC)•Jan 1, 2003•0 citations
Since the first atom interferometry experiments in 1991, measurements of rotation through the Sagnac effect in open-area atom interferometers have been investigated. These studies have demonstrated very high sensitivity that can compete with state-of-the-art optical Sagnac interferometers. Since the early 2000s, these developments have been motivated by possible applications in inertial guidance and geophysics. Most matter-wave interferometers that have been investigated since then are based on two-photon Raman transitions for the manipulation of atomic wave packets. Results from the two most studied configurations, a space-domain interferometer with atomic beams and a time-domain interferometer with cold atoms, are presented and compared. Finally, the latest generation of cold atom interferometers and their preliminary results are presented.
Summary form only given. Matter wave interferometers have become very promising tools in fundamental physics and metrology. The sensitivities obtained with such atomic quantum sensors compete with classical state-of-the-art devices for acceleration and rotation measurements. Currently, we are setting up a new cold atom Sagnac interferometer (CASI) to realize high precision measurements of rotations with a compact and flexible setup. Using cold atoms the experiment aims to achieve sensitivities down to 2/spl times/10/sup -9/ rad/s/Hz for a compact interferometer as short as 15 cm. Rotations and accelerations will be discriminated by synchronous operation of two counterpropagating ensembles of ultra-cold atoms. We will give an overview about the concept and the parameters of our future interferometer. The results of the characterization of our 2D-MOT, which serves as a brilliant source for our cold atom interferometer, will be presented. The compact design of the sensor will be transportable. Thus, it will permit the comparison with other gyroscopes. CASI will be a first step towards a cold atom space experiment of the second generation.