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VERSION:2.0
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METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20260910T014428Z
LAST-MODIFIED:20141103T162558Z
DTSTART:20141112T160000Z
DTEND:20141112T170000Z
UID:event1351@bu.edu
URL:http://physics.bu.edu/internal/events/show/1351
SUMMARY:Relaxation dynamics\, thermalization\, and dynamic phase transition
	s in Heisenberg quantum magnets 
DESCRIPTION:Featuring Dr. Michael Knap\, Harvard University\nHosted by: Mar
	in Bukov\n\nPart of the Condensed Matter Theory Seminar Series.\n\nAbstract
	:\n\nRecent advances in experiments with synthetic many-body systems\, incl
	uding\nultracold atoms\, trapped ions\, and polar molecules\, made it possi
	ble to\nengineer strongly interacting quantum spin systems and to explore t
	heir\ndynamics. Drawing connections to recent experiments\, this talk addre
	sses\nthe question of how a spin spiral pattern with adjustable wave vector
	\nevolves under the Heisenberg model. To understand the evolution\ntheoreti
	cally\, we develop a field theoretic technique based on the\ntwo-particle i
	rreducible (2PI) effective action approach which is\napplicable in arbitrar
	y dimension. We analyze the relaxational dynamics of\nthe spin spiral state
	 and study how it thermalizes in the long time limit.\nIn three dimensions\
	, we find that the transverse magnetization at steady\nstate takes a finite
	 value when tuning the spiral wave vector beyond a\ncritical value\, thus i
	ndicating a dynamic phase transi
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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