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DTSTAMP:20260917T081532Z
LAST-MODIFIED:20140115T174036Z
DTSTART:20140212T160000Z
DTEND:20140212T170000Z
UID:event1224@bu.edu
URL:http://physics.bu.edu/internal/events/show/1224
SUMMARY:Undephasing the generalized Gibbs ensemble
DESCRIPTION:Featuring Prof. Stefan Kehrein\, Georg-August-Universitat Goett
	ingen\nHosted by: Anatoli Polkovnikov\n\nPart of the Condensed Matter Theor
	y Seminar Series.\n\nAbstract: \nUnderstanding the long time limit of close
	d quantum many-body systems prepared in some initial non-equilibrium pure s
	tate has attracted a lot of interest in recent years. One central question 
	is whether such a system will thermalize or not. In integrable systems the 
	long time limit leads generically to a generalized Gibbs ensemble (GGE) des
	cription. For example for the one dimensional transverse field Ising model 
	one can prove that asymptotically all local observables can be calculated i
	n the GGE. In my talk I will show how one can approximately reverse the tim
	e arrow of this dynamics using a spin echo-like local Hamiltonian. In this 
	sense the time evolved system never forgets that it is in a pure state and 
	remembers the initial values of local observables like the longitudinal and
	 transverse magnetization. The time evolution can be thought of as dephasin
	g leading to a GGE\, which can be undone with this spin echo-like setup.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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