Evidence for a critical velocity in a Bose-Einstein condensed gas
arXiv:cond-mat/9909109 · doi:10.1103/PhysRevLett.83.2502
Abstract
We have studied dissipation in a Bose--Einstein condensed gas by moving a blue detuned laser beam through the condensate at different velocities. Strong heating was observed only above a critical velocity.
4 pages, 3 figures