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Q: Fachverband Quantenoptik und Photonik
Q 25: Matter Wave Optics
Q 25.10: Vortrag
Mittwoch, 16. März 2011, 12:45–13:00, BAR Schön
Delta kick cooling: a method for fast adiabatic decompression and its applications to atom interferometry — •Andre Wenzlawski1, Klaus Sengstock1, and the QUANTUS team1,2,3,4,5,6,7,8,9 — 1Institut für Laser-Physik, Universität Hamburg — 2Institut für Quantenoptik, Universität Hannover — 3Institut für Physik, HU Berlin — 4ZARM, Universität Bremen — 5Institut für angewandte Physik, TU Darmstadt — 6Institut für Quantenphysik, Universität Ulm — 7Midlands Ultracold Atom Research Centre, University of Birmingham, UK — 8FBH, Berlin — 9MPQ, Garching
The first realization of a Bose-Einstein condensate in microgravity in 2007 paved the way for the observation of freely evolving ultra cold quantum gases on a much longer timescale than possible in any ground based experiment. We were able to observe a freely expanding BEC for up to 1 second [1] but for longer evolution times the atomic cloud got too thin to be detected efficiently.
To further increase the observation time the concept of delta kick cooling has been implemented in the experimental apparatus. This technique makes use of a magnetic lens and as a result the expansion of the BEC can be slowed down. In this talk I will report on the status of this project and on its applications to our goal to do atom interferometry in space.
The QUANTUS Project is supported by the German Space Agency (DLR) with funds provided by the Federal Ministry of Economics and Technology (BMWi) under grant number DLR 50WM1133.
T. van Zoest et al., Science 328, 1540 (2010).