BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//RLASKEY//CALENDEROUS//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20261021T085437Z
LAST-MODIFIED:20170601T181936Z
DTSTART:20170607T150000Z
DTEND:20170607T160000Z
UID:event1773@bu.edu
URL:http://physics.bu.edu/internal/events/show/1773
SUMMARY:Out-of-time-order correlators in disordered quantum systems
DESCRIPTION:Featuring David J. Luitz\n\nPart of the Condensed Matter Theory
	 Seminar Series.\n\nOut-of-time-order correlators (OTOC) are used\nto study
	 the propagation of local information in isolated quantum systems.\nI will 
	discuss recent results using large scale exact time-evolution\nfor up to L=
	31 spins 1/2 and show that for\nweakly disordered nonintegrable systems inf
	ormation propagates behind\na ballistically moving front\, while the entang
	lement entropy growths\nlinearly in time. For stronger disorder the motion 
	of the information\nfront is algebraic and sub-ballistic with a disorder st
	rength\ndependent exponent which depends on the strength of the disorder\,\
	nsimilarly to\nthe sublinear growth of the entanglement entropy. The\ndynam
	ical exponent associated with the information front coincides\nwith the exp
	onent of the growth of the entanglement entropy for both\nweak and strong d
	isorder and the temporal\ndependence of the OTOC is characterized by a fast
	 nonexponential\ngrowth\, followed by a slow saturation after the passage o
	f the\ninformation front. Finally\, I will mention the implications of this
	\nbehavioral change on the growth of the entanglement entropy.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
END:VEVENT
END:VCALENDAR