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BEGIN:VEVENT
DTSTAMP:20260727T204953Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20080501T173000Z
DTEND:20080501T183000Z
UID:event286@bu.edu
URL:http://physics.bu.edu/internal/events/show/286
SUMMARY:Novel quantum magnetism in Sp(4) and SU(4) spin systems
DESCRIPTION:Featuring Cenke Xu\, Harvard University\n\nPart of the Condense
	d Matter Theory Seminar Series.\n\nAbstract: We study the quantum phases an
	d quantum phase transitions of Sp(4) and SU(4)\nspin systems\, with applica
	tion to spin-3/2 cold atoms. The strong quantum fluctuation of this system 
	leads to many special properties. The Sp(4) Heisenberg model has two indepe
	ndent coefficients\, by tuning which the system goes through a deconfined q
	uantum phase transition between the semiclassical magnetic ordered phase an
	d the dimerized phase with strong quantum\nfluctuations. A quantum resonati
	ng plaquette model was introduced as an effective model of SU(4) Heisenberg
	 systems. The phase diagram of the quantum plaquette model was obtained by 
	a novel gauge field  mapping and duality formalism.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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