To initiate our experiments we cool an ensemble of Rubidium-87 atoms to ultra-low temperatures. Close to the absolute zero,, at a few hundred nanokelvin, the Rubidium atoms form a Bose-Einstein-condensate (BEC) . The size of the condensate is about a tenth millimeter and we image the atoms with a CCD camera. Figure 1 shows how a Bose-Einstein-Condensate emerges from a thermal cloud for three different temperatures (indicated here by the final radiofrequency of the evaporation ramp).
The main parts of our expermental apparatus are
Research on experimental techniques:
Light-induced atom desorption (LIAD) for large rubidium and potassium ensembles
Transport of a quantum degenerate heteronuclear mixture