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BEGIN:VEVENT
DTSTAMP:20261015T003236Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20080515T173000Z
DTEND:20080515T183000Z
UID:event290@bu.edu
URL:http://physics.bu.edu/internal/events/show/290
SUMMARY:Persistent currents and vortices:  The physics of "two-dimensional"
	 Bose-Einstein condensates.
DESCRIPTION:Featuring Kris Helmerson\, NIST\n\nPart of the Condensed Matter
	 Theory Seminar Series.\n\nAbstract: Recent studies of both 1-D and 2-D wea
	kly-interacting\, atomic Bose-Einstein condensates have demonstrated a numb
	er of interesting phenomena including a Tonks-Girardeau gas and the Berezin
	skii-Kosterlitz-Thouless crossover\, respectively. Clearly\, reduced dimens
	ionality or topological constraints enables the observation of new and inte
	resting phenomena. I will describe recent experiments on the confinement of
	 a sodium Bose-Einstein condensate in a toriodal-shaped trap and also in a 
	flat optical trap to produce a ring-shaped and 2-D quantum degenerate gas\,
	 respectively. We have been able to observe a number of phenomena connected
	 with the superfluid transition in such systems\, such as persistent curren
	ts and quasi-condensate formation.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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