Dissipationless flow and superfluidity in gaseous Bose-Einstein condensates
arXiv:cond-mat/0008423
Abstract
We study dissipation in a dilute Bose gas induced by the motion of a macroscopic object. A blue-detuned laser beam focused on the center of a trapped gas of sodium atoms was scanned both above and below the BEC transition temperature. The measurements allow for a comparison between the heating rates for the superfluid and normal gas.
11 pages, submitted to Journal of Low Temperature Physics