Ernst+M.+Rasel

A promising technique for fundamental tests in the quantum domain are matter-wave sensors based on cold atoms or atom lasers, which use atoms as unperturbed microscopic test bodies for measuring inertial forces or as frequency references. The talk will give an overview on matter-wave sensors and our development of inertial sensors. Microgravity is expected to be a decisive ingredient for the next leap in tests in fundamental physics of gravity, relativity and theories beyond the standard model. Microgravity is also of high relevance for matter-wave interferometers and experiments with quantum matter (Bose-Einstein Condensates or degenerate Fermi gases) as it permits the extension the unperturbed free fall of these test particles in a low-noise environment. Experiments in such an environment will also help to establish a new scientific avenue in the research on degenerate quantum gases as it will substantially extend the science of quantum gases towards nowadays inaccessible regimes at lowest temperatures, to macroscopic dimensions, and to unequalled durations of unperturbed evolution of these distinguished quantum objects. With the launch of the development of a mobile BEC platform QUANTUS for microgravity experiments in the drop tower and during parabolic flights within a pilot project, running since January 2004, the DLR took a major first step to establish this field of research in Germany.
 * Quantum sensors for space and time on ground and in space **ppt/pdf
 * Ernst Maria Rasel, Institute for Quantum Optics, University of Hannover **