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BEGIN:VEVENT
DTSTAMP:20260916T105828Z
LAST-MODIFIED:20130920T140638Z
DTSTART:20130930T180000Z
DTEND:20130930T190000Z
UID:event1153@bu.edu
URL:http://physics.bu.edu/internal/events/show/1153
SUMMARY:The Landau criterion for superfluidity is neither necessary nor suf
	ficient
DESCRIPTION:Featuring Gordon Baym\, University of Illinois - Urbana Champag
	ne\nHosted by: David Campbell\n\nPart of the Condensed Matter Theory Semina
	r Series.\n\nAbstract \n"Landau in his classic 1941 paper argued that the f
	low of a superfluid at speeds greater than the (Landau) critical velocity\n
	destroys superfluidity\, and conversely\, that the existence of such a crit
	ical velocity is necessary for superfluidity. As this talk will show\, this
	 criterion is neither necessary nor sufficient. Rather\, if the Landau crit
	erion is violated the superfluid mass density becomes smaller than the tota
	l mass density. After discussing the fundamentals of superfluidity and the 
	superfluid mass density\, this talk will focus on the Landau criterion in t
	he context of various superfluids including an explicit model of the weakly
	 interacting Bose gas."
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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