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BEGIN:VEVENT
UID:1-543@lptms.universite-paris-saclay.fr
DTSTART:20171019T140000Z
DTEND:20171019T150000Z
DTSTAMP:20171009T063036Z
URL:https://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lpt
 ms-cecile-repellin/
SUMMARY:Séminaire du LPTMS: Cécile Repellin - LPTMS\, salle 201\, 2ème 
 étage\, Bât 100\, Campus d'Orsay - 19 Oct 17 14:00
DESCRIPTION:!!!! jour et horaire inhabituels !!!!\n\nNumerical investigatio
 n of gapped edge states in fractional quantum Hall-superconductor heterost
 ructures\nCécile Repellin (MPI\, Dresden\, Allemagne)\nThe possibility of
  realizing anyons -- quasiparticles with fractional  exchange statistics 
 -- is an exciting prospect in the field of  interacting topological phase
 s. Non-abelian anyons\, whose exchange is  characterized by a matrix rath
 er than a simple phase\, are of the most  exotic kind. They are highly so
 ught after as they could be used as  qubits for quantum computation intri
 nsically immune to decoherence. While non-abelian anyons are expected to a
 ppear in the fractional  quantum Hall effect\, engineering systems that p
 urposefully favor their  emergence might be a better strategy to probe th
 eir properties. Progress  in creating quantum devices with Majorana bound
  states represents an  important achievement in this direction. Realizing
  the even more elusive  parafermions\, which unlike Majoranas could suppo
 rt universal quantum  computation\, would be an exciting next step.\n\nPa
 rafermion states have been envisioned to occur in heterostructures  using
  fractional quantum Hall (FQH) states and superconductors. Existing  theo
 retical studies of these systems have been entirely based on  effective t
 heories of fractional quantum Hall edge states which cannot  offer any qu
 antitative analysis of competing energy scales\, correlation  lengths etc
 . To fill this gap\, we propose and implement a numerical  setup for stud
 ying edge states of FQH droplets with a superconducting  instability. Usi
 ng exact diagonalization\, we report the first  observation in a fully mi
 croscopic model of gapped FQH edge modes with  topological degrees of fre
 edom. The topological nature of these modes is  probed through fractional
  Josephson effect and flux insertion\, and  evidence the cooper pairing o
 f fractionalized quasiparticles.\n\n&nbsp\;
CATEGORIES:seminars
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15 
 Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=15 Rue Georges Clemenceau\,
  Orsay\, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=LPTMS\, salle 201\, 2è
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