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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-9324
DTSTART:20250710T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260413T115727Z
LAST-MODIFIED:20250701T152007Z
LOCATION:5310 Chamberlin
SUMMARY:One-dimensional interacting topological phases: a bosonization
  approach\, R. G. Herb Condensed Matter Seminar\,  Polina Matveeva\, U
 MN
DESCRIPTION:I will talk about the topological properties of one-dimens
 ional interacting fermionic phases.<br>\nIn the first part of my talk\
 , I will discuss the properties of fermionic microscopic models built 
 from two coupled Su-Schrieffer-Heeger chains. We showed that such a sy
 stem realizes all possible Altland-Zirnbauer symmetry classes. I will 
 briefly discuss some general properties of these chain models that do 
 not directly follow from the non-interacting classification table. In 
 particular\, we demonstrated that the non-interacting models that belo
 ng to Z classes can be adiabatically deformed into one another without
  changing the topological invariant as long as chiral symmetry is pres
 erved. As a next step\, I will discuss the effects of weak interaction
 s on the topological properties of these chain models using bosonizati
 on and show that the chiral symmetry protects topology also in the int
 eracting case. <br>\n<br>\nIn the second part of my talk\, I will swit
 ch to a microscopic model of strongly interacting spinful fermions\, w
 here the gap is opened due to interactions. I will discuss the non-tri
 vial topological properties of both insulating and metallic phases tha
 t emerge at the critical lines between gapped phases. I will discuss h
 ow these phases relate to and differ from single-particle topological 
 phases.
URL:https://www.physics.wisc.edu/events/?id=9324
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