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SUMMARY:Topological Proximity Effects - Karyn Le Hur\, CNRS and Ecole Poly
 technique
DTSTART:20201022T130000Z
DTEND:20201022T140000Z
UID:TALK152182@talks.cam.ac.uk
CONTACT:Jan Behrends
DESCRIPTION:We discuss the induction of new topological band structures fr
 om proximity effects and entanglement. We present how to engineer a p+ip t
 opological superconductor in quantum wires with spin-orbit coupling from t
 he vicinity of a reservoir with s-wave Cooper pairing. Topological propert
 ies of energy bands associated with a spin-1/2 representation can be chara
 cterized from the reciprocal space and the Bloch sphere. The topological C
 hern number of one spin-1/2 model is known to be an integer. We highlight 
 how to realize fractional topological phases directly from the reciprocal 
 space\, through the proximity effect and entanglement between two Bloch sp
 heres. We show the applicability of these rational-valued Chern numbers in
  quantum circuits and a correspondence with honeycomb bilayer systems deve
 loping a nodal semimetallic ring at one Dirac point only.
LOCATION:Details of video conferencing will be distributed nearer the time
 .
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