Darmstadt 2008 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
Q: Fachverband Quantenoptik und Photonik
Q 27: Poster Quantengase
Q 27.4: Poster
Tuesday, March 11, 2008, 16:30–19:00, Poster C2
Bose-Einstein condensation and atom optical experiments — •Thomas Lauber1, Susanne Hertsch1, Markus Krutzik1, Johanna Nes1, Oliver Wille1, Anna Sanpera2, and Gerhard Birkl1 — 1Institut für Angewandte Physik; Technische Universität Darmstadt, Schlossgartenstr. 7, D-64289 Darmstadt — 2Department of Physics, Theoretical Physics Group, Universitat Autónoma Barcelona, E-08193 Bellaterra
Optical trapping and guiding configurations have evolved as a powerful tool for the manipulation of ultracold atoms. In our experiment, rubidium atoms are loaded in a crossed optical dipole trap of 1030nm laser beams directly from a MOT. We create ultracold atom samples in the sub-microKelvin temperature range by evaporative cooling.
The advantage of a pure optical setup is its flexibility and independence of the magnetic properties of the trapped atoms. It is also possible to superimpose arbitrary magnetic fields on the trapping configuration. Our work aims at studying the coherence properties of ultracold thermal atoms and degenerate quantum gases in traps created by miniaturized optical lens structures. With these elements we can realize various trap geometries including a storage ring for atom interferometry experiments, and optical waveguides, in which the ultracold gas can be transferred.
Recent calculations promise an interesting velocity selective behaviour in one-dimensional periodic structures superimposed on a waveguide. We can implement these structures either with standing waves or microlens arrays.