BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3627
DTSTART:20150211T220000Z
DTEND:20150211T230000Z
DTSTAMP:20240329T103648Z
LAST-MODIFIED:20150209T143237Z
LOCATION:4274 Chamberlin
SUMMARY:Dynamical signatures and applications of many-body localizatio
n\, R. G. Herb Condensed Matter Seminar\, Sarang Gopalakrishnan\, Harv
ard University
DESCRIPTION:The many-body localization (MBL) transition in isolated qu
antum systems is
\na transition at which equilibrium statistical m
echanics breaks down\; the
\nresulting localized phase has extensi
vely many local conserved quantities
\nand acts as a quantum memor
y. In this talk\, I consider experimentally
\nfeasible probes of t
he MBL phase\, such as a.c. conductivity\, polarization
\ndecay\,
and the response to spin echo protocols\, and show that these probes
\ngive clear signatures of MBL that distinguish it from single-part
icle
\nlocalization\, even in realistic systems that are only impe
rfectly isolated
\nfrom the environment. I then turn to the regime
near the MBL transition\,
\nand show that low-frequency response
in this regime exhibits is dominated
\nby rare-region effects\, wh
ich can be described using "Griffiths"
\narguments. Finally\, I co
mment on how the absence of intrinsic decoherence
\nin the localiz
ed phase can be used as a resource for quantum information
\nscien
ce.
URL:https://www.physics.wisc.edu/events/?id=3627
END:VEVENT
END:VCALENDAR