Bose-Einstein condensed gases at finite temperatures
Dr. Fabrice Gerbier (Institut für Physik)

In this talk, I will present experimental results obtained in Orsay concerning the thermodynamics of Bose-Einstein condensed gases. These results illustrate that both the trapping potential and atomic interactions play an important role in these systems. I will discuss in particular how the critical temperature at which Bose-Einstein condensation occurs is modified by inter-atomic interactions, and a new method using momentum-changing Bragg transitions to filter the condensate out of the termal cloud.