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BEGIN:VEVENT
DTSTAMP:20260815T172225Z
LAST-MODIFIED:20170912T160128Z
DTSTART:20171004T150000Z
DTEND:20171004T160000Z
UID:event1832@bu.edu
URL:http://physics.bu.edu/internal/events/show/1832
SUMMARY:"Stability of quantum statistical ensembles with respect to local m
	easurements"
DESCRIPTION:Featuring Walter Hahn\, Skolkovo Institute of Science and Techn
	ology\, Moscow\nHosted by: Anatoli Polkovnikov\n\nPart of the Condensed Mat
	ter Theory Seminar Series.\n\nWe introduce a stability criterion for quantu
	m statistical ensembles describing macroscopic systems. An ensemble is call
	ed "stable" when a small number of local measurements cannot significantly 
	modify the probability distribution of the total energy of the system. We a
	pply this criterion to lattices of spins-1/2\, thereby showing that the can
	onical ensemble is nearly stable\, whereas statistical ensembles with much 
	broader energy distributions are not stable. In the context of the foundati
	ons of quantum statistical physics\, this result justifies the use of stati
	stical ensembles with narrow energy distributions such as canonical or micr
	ocanonical ensembles.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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