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VERSION:2.0
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BEGIN:VEVENT
DTSTAMP:20260825T083200Z
LAST-MODIFIED:20170919T145442Z
DTSTART:20170922T160000Z
DTEND:20170922T173000Z
UID:event1836@bu.edu
URL:http://physics.bu.edu/internal/events/show/1836
SUMMARY:"Interfering directed paths & the sign phase transition"
DESCRIPTION:Featuring Christopher Baldwin\, Boston University\, Physics Dep
	artment\n\nPart of the Condensed Matter Theory Seminar Series.\n\nWe consid
	er the problem of interfering directed paths in disordered media\, and disc
	uss the physical contexts in which this problem arises. An important proper
	ty of the path sum is the statistics of its sign. The average sign may tend
	 to zero ("sign-disordered") or remain finite ("sign-ordered") at long dist
	ance\, depending on dimensionality and the concentration of negative scatte
	ring sites x. We discuss the analogy with a dynamical out-of-equilibrium Is
	ing field. We further show that the sign-ordered phase is always unstable f
	or any non-zero x in 2D by identifying rare destabilizing events\, and pres
	ent numerical evidence that it is stable in 3D. These results have conseque
	nces for several different physical systems\, which we conclude by describi
	ng.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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