[Todos] Coloquios del Departamento de Física (hoy martes, 11hs)

[pdmitruk en df.uba.ar]

Recordamos el coloquio extra de hoy,

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                                 COLOQUIO EXTRA

                            Martes 30 de noviembre, 11hs,
                                  Aula Federman


              Realizing Majorana fermions and topological quantum computation



                                   Felix von Oppen

                               Freie Universitaet Berlin


Topological quantum computation provides an elegant way around
decoherence, as one encodes quantum information in a non-local fashion
that the environment finds difficult to corrupt. In this talk I will
describe a surprising new topological quantum computation platform:
one-dimensional semiconductor wire networks. Recent work provides a
recipe for driving semiconducting wires into a topological phase
supporting long-sought particles known as Majorana fermions that can
store topologically protected quantum information. Majorana fermions
in this setting can be transported, created, and fused by applying
locally tunable gates to the wire. More importantly, networks of such
wires allow Majorana fermions to be meaningfully braided, exhibiting
non-Abelian statistics like vortices in a p + ip superconductor. We
propose experimental setups that allow for efficient exchange of
arbitrary numbers of Majorana fermions.