Dissipationless flow and superfluidity in gaseous Bose-Einstein condensates

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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

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Soft Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/16725

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0008423
 http://arxiv.org/abs/cond-mat/0008423

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arXiv