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Majorana fermions in noisy Kitaev wires

Event Details

Event Dates: 

Wednesday, April 20, 2016 - 12:00pm

Seminar Location: 

  • JILA Auditorium

Speaker Name(s): 

Mikhail Baranov

Speaker Affiliation(s): 

Institute for Quantum Optics and Quantum Information-Innsbruck
Seminar Type/Subject

Scientific Seminar Type: 

  • JILA Public Seminar

Event Details & Abstract: 

Majorana fermions (non-Abelian anyons) appear as edge states in the topological phase of the Kitaev wire, and are naturally immune to static disorder. I discuss the effects of a classical noise (“time-dependent disorder”) on the Majorana edge correlations, and on the fidelity of braiding operations for both global and local noise in the chemical potential. While in general noise will induce heating and dephasing, it is still possible to have long-lived quantum correlations in the presence of fast noise due to motional narrowing, even when the noise drives the system rapidly between the topological and non-topological phases.