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BEGIN:VEVENT
DTSTAMP:20260914T040803Z
LAST-MODIFIED:20130429T162318Z
DTSTART:20130501T181500Z
DTEND:20130501T191500Z
UID:event1096@bu.edu
URL:http://physics.bu.edu/internal/events/show/1096
SUMMARY:Equilibration and coarsening in the quantum O(N) model
DESCRIPTION:Featuring Anushya Chandran\, Princeton University\nHosted by: M
	ichael Kolodrubetz\n\nPart of the Condensed Matter Theory Seminar Series.\n
	\nAbstract:\nThe quantum O(N) model in the infinite N limit is a paradigm f
	or\ncontinuous symmetry-breaking. Its phase diagram provides an excellent\n
	qualitative guide to the equilibrium physics of symmetry breaking across\ns
	patial dimensions. In this talk\, I will investigate the physics of this\nm
	odel out of equilibrium\, and in particular\, its response to global\nquenc
	hes starting from the disordered phase. If the model were to\nequilibrate\,
	 the late time state would follow from the finite temperature\nphase diagra
	m. At infinite N\, however\, the model cannot equilibrate to a\nGibbs ensem
	ble due to the presence of an infinite number of conserved\nquantities. Rem
	arkably\, I will show that it also fails to relax to a\ngeneralized Gibbs e
	nsemble consistent with these conserved quantities.\nNevertheless\, the lat
	e time states following quenches bear strong\nsignatures of the equilibrium
	 phase diagram. For example\, the model\nexhibits coarsening to a non-equil
	ibrium critical state only in dimensions\nd>2\, that is\, if the equilibriu
	m phase diagram contains an ordered phase\nat non-zero temperature.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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