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FM: Fall Meeting

FM 19: Topology: Majoranas

FM 19.1: Invited Talk

Montag, 23. September 2019, 16:30–17:00, 1199

Topological superconductivity in full shell proximitized nanowires — •Roman Lutchyn — Microsoft Quantum, Microsoft Station Q, University of California, Santa Barbara, California 93106-6105 USA

I will discuss a new model system supporting Majorana zero modes based on semiconductor nanowires with a full superconducting shell. I will demonstrate that, in the presence of spin-orbit coupling in the semiconductor induced by a radial electric field, the winding of the superconducting order parameter leads to a topological phase supporting Majorana zero modes. The topological phase persists over a large range of chemical potentials and can be induced by a predictable and weak magnetic field piercing the cylinder. The system can be readily realized in semiconductor nanowires covered by a full superconducting shell, opening a pathway for realizing topological quantum computing proposals.