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BEGIN:VEVENT
DTSTAMP:20260731T222339Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20120216T180000Z
DTEND:20120216T190000Z
UID:event871@bu.edu
URL:http://physics.bu.edu/internal/events/show/871
SUMMARY: Non-equilibrium dynamic critical scaling of the transverse-field I
	sing chain
DESCRIPTION:Featuring Michael Kolodrubetz\, Princeton University\nHosted by
	: Anatoli Polkovnikov\n\nPart of the Condensed Matter Theory Seminar Series
	.\n\nAbstract:\nThe one-dimensional transverse-field Ising chain is a proto
	typical example of system that undergoes a continuous quantum phase transit
	ion. While its equilibrium scaling has been understood for more than half a
	 century\, I will discuss the non-equilibrium quantum critical dynamics as 
	the system is swept slowly through the critical point (a Kibble-Zurek ramp)
	. Kibble-Zurek scaling is well understood for ramps that end at the quantum
	 critical point or deep in the ordered phase. In this talk\, I will describ
	e our solution for the full finite-size scaling functions of excess heat an
	d spin-spin correlation function at an arbitrary time during the ramp. Thes
	e scaling functions yield a number of surprises\, including negative spin c
	orrelations on the ferromagnetic side of the transition\, demonstrating qua
	litatively the athermal nature of the ramp. We then confirm the universalit
	y of the scaling functions by numerically simulating Mott-insulating bosons
	 in a tilted potential\, an experimentally-realizable system in the same un
	iversality class [J. Simon et. al.\, Nature 472\, 307 (2011)]. Our results 
	indicate that the time scales necessary to see this dynamic scaling should 
	be within the reach of present-day cold atom experiments.\nKrishnendu Sengu
	pta (Indian Assoc. for the Cultivation of Science)
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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