Berlin 2012 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 35: Transport: Quantum Coherence and Quantum Information Systems 3 (jointly with TT, MA)

HL 35.1: Invited Talk

Tuesday, March 27, 2012, 09:30–10:00, BH 243

Making and manipulating Majorana fermions for topological quantum computation — •Felix von Oppen — Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Unviversitaet Berlin, 14195 Berlin

Known theoretically for decades, Majorana fermions have never been observed as fundamental particles. But there is growing excitement among condensed matter physicists that Majorana fermions could be observed as quasiparticles in the solid state. This excitement is fueled by their remarkable properties: They are their own antiparticle and obey an exotic (and yet unobserved) form of quantum statistics called non-Abelian statistics. These properties make Majorana fermions the simplest candidate for realizing topological quantum information processing which could go a long way towards alleviating the problem of decoherence in conventional quantum computation.

Among the systems predicted to support Majorana fermions are exotic fractional quantum Hall states as well as hybrid structures of topological insulators, semimentals, or semiconductors with conventional superconductors. Realizations based on semiconductor quantum wires in proximity to conventional superconductors are perhaps particularly promising since they allow for relatively detailed scenarios of how to manipulate the Majorana fermions. In this talk, I will discuss this proposal to realize Majorana fermions.