4.6 Article

Vortex control in superconducting Corbino geometry networks

Journal

PHYSICAL REVIEW B
Volume 106, Issue 2, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.106.024501

Keywords

-

Funding

  1. Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [RTG 1995]
  2. Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) via Germany's Excellence Strategy -Cluster of Excellence Matter and Light for Quantum Computing (ML4Q) [EXC 2004/1 -390534769]
  3. Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) via Germany's Excellence Strategy-EXC-2123 QuantumFrontiers [390837967]
  4. RWTH Aachen University [rwth0601, rwth0507]

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This study proposes a superconducting structure that enables the nucleation and control of vortices on-demand by controlling magnetic fields and currents. By introducing normal conducting rails to guide the nucleation process and motion of vortices, the researchers addressed the randomness of nucleation and studied the effects of rail-vortex and vortex-vortex interactions on resistance quantization.
In superconductors, vortices induced by a magnetic field are nucleated where some random fluctuations determine the nucleation position, and then may be pinned by impurities or boundaries, impeding the development of vortex-based quantum devices. Here, we propose a superconducting structure, which allows to nucleate and control vortices on-demand by controlling magnetic fields and currents. Using time-dependent Ginzburg-Landau theory, we study a driven vortex motion in two-dimensional Corbino geometries of superconductor-normal metal-superconductor Josephson junctions. We remedy the randomness of nucleation by introducing normal conducting rails to the Corbino disk to guide the nucleation process and motion of vortices towards the junction. We elaborate on the consequences of rail-vortex and vortex-vortex interactions to the quantization of resistance across the junction. Finally, we simulate the nucleations and manipulations of two and four vortices in Corbino networks, and discuss its application to Majorana zero mode braiding operations. Our study provides a potential route towards quantum computation with non-Abelian anyons.

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