5-6 juin 2018 78470 Saint-Rémy-lès-Chevreuse (France)
Mardi 5
Circuits quantiques et dispositifs hybrides

› 16:45 - 17:00 (15min)
› Bât D9, Auditorium C7
Optimization of a micro-magnet array for Majorana fermions in a two-dimensional electron gas.
Sara Turcotte  1@  , Samuel Boutin  1@  , Julien Camirand Lemyre  1@  , Michel Pioro-Ladrière  1@  , Ion Garate  1@  
1 : Institut quantique et département de physique, Université de Sherbrooke  -  Site web
2500 boul. de lÚniversité, Sherbrooke, QC J1K 2R1 -  Canada

Majorana fermions are topologically protected quasi-particles that appear at the end of unidimensional semiconductor wires with large spin-orbit coupling and induced superconductivity. While current implementations mostly rely on nanowires with large intrinsic spin-orbit coupling, these approaches offer poor control on properties such as the length of the wire and the confinement potential. Here, a versatile design consisting of a micro-magnet array is explored to engineer the spin-orbit coupling in a two-dimensional electron gas. With numerical simulations of different geometries, suitable conditions for the experimental observation of Majorana fermions in gallium arsenide and silicon are determined.


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