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BEGIN:VEVENT
DTSTAMP:20260825T002127Z
LAST-MODIFIED:20121116T203436Z
DTSTART:20100416T160000Z
DTEND:20100416T170000Z
UID:event573@bu.edu
URL:http://physics.bu.edu/internal/events/show/573
SUMMARY:Breakdown of thermalization in finite one-dimensional systems 
DESCRIPTION:Featuring Marcos Rigol\, Georgetown University\nHosted by: Anat
	oli Polkovnikov\n\nPart of the Biophysics/Condensed Matter Seminar Series.\
	n\nAbstract: Little more than fifty years ago\, Fermi\, Pasta\, and Ulam se
	t up a numerical experiment to prove the ergodic hypothesis for a one-dimen
	sional lattice of harmonic oscillators when nonlinear couplings were added.
	 Much to their surprise\, the system exhibited long-time periodic dynamics 
	with no signals of ergodic behavior. Those results motivated intense resear
	ch\, which ultimately gave rise to the modern chaos theory and to a better 
	understanding of the basic principles of classical statistical mechanics. M
	ore recently\, experiments with ultracold gases in one-dimensional geometri
	es have challenged our understanding of the quantum domain. After bringing 
	a nearly isolated system out of equilibrium\, no signals of relaxation to t
	he expected thermal equilibrium distribution were observed. Some of those r
	esults can be understood in the framework of integrable quantum systems\, b
	ut then it remains the question of why thermalization did not occur even wh
	en the system was supposed to be far from integrability. In the latter regi
	me\, thermalization is expected to occur and can be understood on the basis
	 of the eigenstate thermalization hypothesis. In this talk\, we utilize qua
	ntum quenches to study how thermalization breaks down in finite one-dimensi
	onal lattices as one approaches an integrable point.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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