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VERSION:2.0
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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260916T192557Z
LAST-MODIFIED:20160913T175543Z
DTSTART:20161014T160000Z
DTEND:20161014T170000Z
UID:event1643@bu.edu
URL:http://physics.bu.edu/internal/events/show/1643
SUMMARY:Magnetism\, rotons\, and beyond: engineering atomic systems with la
	ttice shaking
DESCRIPTION:Featuring Colin Parker\, Georgia Institute of Technology\n\nPar
	t of the Biophysics/Condensed Matter Seminar Series.\n\nConventional method
	s of quantum simulation rely on kinectic energy determined by free particle
	 dispersions or simple sinusoidal optical lattices. Solid state systems\, b
	y contrast\, exhibit a plethora of band structures which differ quantitativ
	ely\, qualitatively\, and even topologically. To what extent does this vari
	ety explain the many electronic phenomena observed in these materials? I wi
	ll show work that addresses this question by subjecting an otherwise simple
	 Bose superfluid to a customized band structure engineered by dynamically p
	hase modulating (shaking) an optical lattice. The engineered dispersion con
	tains two minima which we associate to a pseudospin degree of freedom. Surp
	risingly\, in such a system the Bose superfluid exhibits many new behaviors
	. The psuedospin develops a ferromagnetic order\, which can lead to polariz
	ation of the entire sample or to sub-division into polarized domains. The e
	xcitations of the system also exhibit the roton-maxon structure associated 
	with strong interactions in superfluid helium. I will also discuss planned 
	efforts to bring the technique to fermionic atoms.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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