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Colloquia

ics Colloquium
Friday, April 14, 2000
4:00 PM
Physics Building, Room 204
Note special time.
Eugene Kolomeisky [Host: Joseph Poon]
University of Virginia
"Superfluidity in low dimensions: beyond the mean-field theory"
ABSTRACT:
The Gross-Pitaevskii approximation is a long-wavelength theory widely used to describe a variety of properties of dilute Bose condensates, in particular trapped alkali gases. In this talk I will show that for short-ranged repulsive interactions this theory fails in one and two spatial dimensions, and appropriate low-dimensional modifications will be proposed. The new theory has a universal character, and some of its implications such as density profiles in confining potentials, superfluidity, solitons, and self-similar solutions will be discussed.

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