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DTSTAMP:20260713T060749
DTSTART:20171016T113000
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URL:https://murmitoyen.com/events/vanille/udem/detail/782297-quantum-dot-ch
 ains-as-emulators-of-topological-superconductors
LOCATION:Université de Montréal - Pavillon Roger-Gaudry\, 2900\, chemin d
 e la Tour\, Montréal\, QC\, Canada\, H3T 1J6
SUMMARY:Quantum dot chains as emulators of topological superconductors
DESCRIPTION:Conférencier: Sergey Frolov\, Department of Physics and Astron
 omy\, University of Pittsburgh
\nAbstract: Tunneling spectroscopy measurem
 ents on one-dimensional superconducting hybrid materials have revealed sig
 natures of Majorana fermions which are the edge states of a bulk topologic
 al superconducting phase. We couple strong spin-orbit semiconductor InSb n
 anowires to conventional superconductors (NbTiN\, Al) to obtain additional
  signatures of Majorana fermions and to explore the magnetic-field driven 
 topological phase transition. Specifically\, we map out the phase diagram 
 of the topological phase in the space of Zeeman energy and chemical potent
 ial\, and investigate the apparent closing and re-opening of the supercond
 ucting gap. We investigate how the topological superconducting phase would
  manifest in finite size systems\, by electrostatically splitting the wire
  into segments of varied length. By chaining up several segments of a nano
 wire\, we are realizing a quantum simulator of the Kitaev chain with tunab
 le on-site energies and couplings between the sites\, a step towards quant
 um simulation with semiconductor nanostructures.
\nBio: 1996-2000 B.S. in 
 Physics and Mathematics\, Moscow Institute of Physics and Technology\, 200
 0-2005 Ph.D. in Physics\, Van Harlingen group at the University of Illinoi
 s at Urbana-Champaign\, 2005-2008 postdoc in Folk group at the University 
 of British Columbia\, 2008-2012 postdoc in Kouwenhoven group at Delft Univ
 ersity of Technology\, September 2012 assistant professor in Frolov group 
 at the University of Pittsburgh.
\nFor more information\, you can consult 
 Prof. Frolov's web 
\nCette conférence est présentée par le RQMP Vers
 ant Nord du Département de physique de l'Université de Montréal et de
  Génie physique de la Polytechnique.
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