Regensburg 2022 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 1: Topology: Majorana Physics
TT 1.11: Talk
Monday, September 5, 2022, 12:30–12:45, H10
Steering Majorana braiding via skyrmion-vortex pairs: a scalable platform — Jonas Nothhelfer1, •Sebastián A. Díaz1, Stephan Kessler2, Tobias Meng3, Matteo Rizzi4,5, Kjetil M. D. Hals6, and Karin Everschor-Sitte1 — 1University of Duisburg-Essen, Duisburg, Germany — 2Johannes Gutenberg University of Mainz, Mainz, Germany — 3Technische Universität Dresden, Dresden, Germany — 4Forschungszentrum Jülich, Jülich, Germany — 5University of Cologne, Cologne, Germany — 6University of Agder, Grimstad, Norway
Majorana zero modes are quasiparticles that hold promise as building blocks for topological quantum computing. However, the litmus test for their detection, the observation of exotic non-abelian statistics revealed by braiding, has so far eluded experimental efforts. Here we take advantage of the fact that skyrmion-vortex pairs in superconductor-ferromagnet heterostructures harboring Majorana zero modes can be easily manipulated in two spatial dimensions. We adiabatically braid the hybrid topological structures and explicitly confirm the non-abelian statistics of the Majorana zero modes numerically using a self-consistent calculation of the superconducting order parameter. Our proposal of controlling skyrmion-vortex pairs provides the necessary leeway toward a scalable topological quantum computing platform.
[1] J. Nothhelfer, S. A. Díaz, S. Kessler, T. Meng, M. Rizzi, K. M. D. Hals, K. Everschor-Sitte, arXiv:2110.13983