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Integrating micromagnets and hybrid nanowires for topological quantum computing

by Malcolm J. A. Jardine, John P. T. Stenger, Yifan Jiang, Eline J. de Jong, Wenbo Wang, Ania C. Bleszynski Jayich, Sergey M. Frolov

Submission summary

As Contributors: Sergey Frolov · Malcolm Jardine
Arxiv Link: https://arxiv.org/abs/2104.05130v3 (pdf)
Date accepted: 2021-10-15
Date submitted: 2021-10-01 12:03
Submitted by: Frolov, Sergey
Submitted to: SciPost Physics
Academic field: Physics
Specialties:
  • Condensed Matter Physics - Experiment
  • Condensed Matter Physics - Computational
Approaches: Experimental, Computational

Abstract

Majorana zero modes are expected to arise in semiconductor-superconductor hybrid systems, with potential topological quantum computing applications. One limitation of this approach is the need for a relatively high external magnetic field that should also change direction at nanoscale. This proposal considers devices that incorporate micromagnets to address this challenge. We perform numerical simulations of stray magnetic fields from different micromagnet configurations, which are then used to solve for Majorana wavefunctions. Several devices are proposed, starting with the basic four-magnet design to align magnetic field with the nanowire and scaling up to nanowire T-junctions. The feasibility of the approach is assessed by performing magnetic imaging of prototype patterns.

Published as SciPost Phys. 11, 090 (2021)



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Comments

Sergey Frolov  on 2021-10-01  [id 1797]

We point out to the editor that this work is an experimental proposal paper that has the potential to open a new direction in the search for Majorana zero modes using micromagnet patterns as feasible means with distinct advantages, and through this satisfies the SciPost submission criterion 3.

We uploaded a new version v3 to arxiv and in the /anc folder you can find a pdf with all changes highlighted in red for v3 and blue for v2 of the manuscript.