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TZID:Europe/Paris
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BEGIN:VEVENT
UID:0-630@lptms.universite-paris-saclay.fr
DTSTART:20181211T110000Z
DTEND:20181211T120000Z
DTSTAMP:20181113T213822Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-christophe-mora/
SUMMARY:Séminaire du LPTMS: Christophe Mora - LPTMS\, salle 201\, 2ème é
 tage\, Bât 100\, Campus d'Orsay - 11 Déc 18 11:00
DESCRIPTION:Parafermions and symmetry-enriched Majorana fermions in one-dim
 ensional fermionic models\nChristophe Mora (Laboratoire Pierre Aigrain\, E
 NS\, Paris)\nStabilizing and manipulating exotic emergent quasiparticles i
 s one of the main goal of modern condensed matter physics. The quest for o
 bserving Majorana fermions and their non-Abelian braiding statistics in su
 perconducting nanostructures is currently attracting a lot of attention\, 
 with fascinating prospects in fault-tolerant quantum computation. Paraferm
 ions are the simplest generalization of Majorana fermions: they show non-A
 belian fractional statistics and are typically associated with topological
  phases. We will discuss the possibility of harboring these exotic excitat
 ions in genuinely one-dimensional electronic platforms. We focus on a spec
 ific model of fermions in one dimension with a generalized ZN multiplet pa
 iring extending the standard and so-called Kitaev chain model. Using a com
 bination of analytical techniques\, we find an interesting topological pha
 se intertwined with spontaneous symmetry breaking. Each symmetry-breaking 
 sector is shown to possess a pair of boundary Majorana fermions encoding a
  topological character. A careful study of the quantum anomaly through pum
 ping in the system finally reveals that parafermions exist in one dimensio
 n but only as non-local operators.\n\nReferences:\n\n 	Fernando Iemini\, C
 hristophe Mora &amp\; Leonardo Mazza\, Topological phases of parafermions:
  a model with exactly-solvable ground states\, Phys. Rev. Lett. 118\, 1704
 02 (2017)\n 	Leonardo Mazza\, Fernando Iemini\, Marcello Dalmonte &amp\; C
 hristophe Mora\, Poor man's parafermions in a lattice model with even mult
 iplet pairing\, preprint cond-mat arXiv:1801.08548.\n
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
 me étage\, Bât 100\, Campus d'Orsay:geo:48.698185,2.181768
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