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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3627
DTSTART:20150211T220000Z
DTEND:20150211T230000Z
DTSTAMP:20260419T153713Z
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<br>
\na transition at which equilibrium statistical m
 echanics breaks down\; the<br>
\nresulting localized phase has extensi
 vely many local conserved quantities<br>
\nand acts as a quantum memor
 y. In this talk\, I consider experimentally<br>
\nfeasible probes of t
 he MBL phase\, such as a.c. conductivity\, polarization<br>
\ndecay\, 
 and the response to spin echo protocols\, and show that these probes<b
 r>
\ngive clear signatures of MBL that distinguish it from single-part
 icle<br>
\nlocalization\, even in realistic systems that are only impe
 rfectly isolated<br>
\nfrom the environment. I then turn to the regime
  near the MBL transition\,<br>
\nand show that low-frequency response 
 in this regime exhibits is dominated<br>
\nby rare-region effects\, wh
 ich can be described using "Griffiths"<br>
\narguments. Finally\, I co
 mment on how the absence of intrinsic decoherence<br>
\nin the localiz
 ed phase can be used as a resource for quantum information<br>
\nscien
 ce.
URL:https://www.physics.wisc.edu/events/?id=3627
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