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DTSTAMP:20260415T080143
DTSTART:20140602T113000
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URL:https://murmitoyen.com/events/vanille/udem/detail/393010
LOCATION:Université de Montréal - Pavillon J.-Armand-Bombardier\, 5155\, 
 chemin de la rampe \, Montréal\, QC\, Canada\, H3T 2B2
SUMMARY:Quantum transport in nanowires: developing platforms for semiconduc
 tor-based QIP – Jonathan Baugh
DESCRIPTION:Jonathan Baugh\, Institute for Quantum Computing and Department
  of Chemistry\, University of Waterloo\, Waterloo\, On\, Canada.Low-bandga
 p semiconductor nanowires such as InAs and InSb have recently gained atten
 tion as materials for realizing topological states and spin-orbit qubits. 
 Critical to understanding these experiments and designing nanowire-based q
 uantum devices is a deep understanding of the radially confined modes and 
 the shape of the radial potential that determines these states. Two recent
  experiments performed by my group help to illuminate the radial subband s
 tructure in InAs nanowires in two very different contexts. One is a study 
 of the magnetic field and gate dependence of short-channel (quasiballistic
 ) field-effect devices that shows how magnetoconductance provides a ‘fin
 gerprint’ of the radial subband structure. The second is a study of prox
 imity effect superconductivity in field-effect device with Nb contacts. A 
 puzzling interference pattern in the critical current versus axial magneti
 c field is observed\, which we explain by a model of quantum interference 
 between the paths of electrons occupying subbands characterized by differe
 nt angular momentum quantum numbers.Site web du groupe du  Prof. BaughCet
 te conférence est présentée par le RQMP Versant Nord du Département d
 e physique de l'Université de Montréal et le Département de génie phys
 ique de Polytechnique Montréal.
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