Dissipationless flow and superfluidity in gaseous Bose-Einstein condensates

Details Dissipationless flow and superfluidity in gaseous Bose-Einstein condensates Dissipationless flow and superfluidity in gaseous Bose-Einstein condensates

2000-08-29

arxiv.org/abs/cond-mat/0008423v1

Physics

Condensed Matter

Soft Condensed Matter

11 pages, submitted to Journal of Low Temperature Physics

Scientific paper

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.

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