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BEGIN:VEVENT
DTSTAMP:20260913T010306Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20110215T203000Z
DTEND:20110215T213000Z
UID:event695@bu.edu
URL:http://physics.bu.edu/internal/events/show/695
SUMMARY:Interaction induced delocalization in Bose gas
DESCRIPTION:Featuring Valery Pokrovsky\, Texas A & M University and Landau 
	Institute of  Theoretical Physics\nHosted by: Anatoli Polkovnikov\nPoster: 
	http://physics.bu.edu/posters/2011_Spring/03_Pokrovsky.pdf\n\nPart of the P
	hysics Department Colloquia Series.\n\nAbstract:  Anderson localization of 
	a particle in a disordered medium is a basic quantum phenomenon. Abrahams e
	t al. argued that a quantum particle is localized at any energy in 1 and 2 
	dimensions and at energies below some threshold value in 3 d. However\, the
	ir arguments relate to a single particle or an ideal quantum gas. How the i
	nteraction changes the properties of a many-body system? In this talk the i
	nteraction-localization competition will be considered mainly for weakly in
	teracting Bose gas in a random environment. Deeply localized states (the so
	-called Lifshitz tails) are filled by interacting particles up to some ener
	gy level. The filling grows with the number of particles growing until they
	 became delocalized. Simultaneously the global coherence is established lea
	ding to superfluidity. Recently this idea was applied for explanation of th
	e phase diagram near the superconductor-insulator transition.  We discuss r
	ecent experiments with cooled atomic gases in the random field of speckles 
	and in quasiperiodic potentials and experiments on superconductor-insulator
	 transition.
LOCATION:SCI 107\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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