[Todos] HOY: Coloquios DF - Felix von Oppen (FU-Berlin), 14hs, Aula Seminario, 2do piso, Pab. I

[Augusto Roncaglia]

COLOQUIOS DEL DEPARTAMENTO DE F�SICA FCEYN - UBA


              En el Aula Seminario, 2do piso, Pab. I,

              Jueves 26/11, 14hs:

              FELIX VON OPPEN

              FU-Berlin


             *Magnetic adatoms on superconductors - a new venue for
Majorana bound states?*

Motivated in part by the quest for topological quantum computation, there is
a substantial ongoing research effort to realize Majorana bound states and
topological superconductivity in condensed matter systems. Majorana bound
states are related to Majorana fermions in high-energy physics, but obey an
exotic - and yet unobserved - form of quantum statistics called non-abelian
statistics.

Following prominent experiments on semiconductor quantum wires, Nadj-Perge
et al. [Science 346, 602 (2014)] recently provided possible evidence for
Majorana bound states in chains of magnetic adatoms on a conventional
superconductors. In this talk, I will begin with a general introduction to
the physics of Majorana bound states. The second part will then discuss the
physical picture underlying this experiment, including an explanation of
the unexpectedly strong localization of the observed end states.
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