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Colloquia
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 meanfield theory"

ABSTRACT:
The GrossPitaevskii approximation is a longwavelength 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
shortranged repulsive interactions this theory fails in one and two spatial
dimensions, and appropriate lowdimensional 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
selfsimilar solutions will be discussed. 



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