What is it about?

The control of magnetic flux in Josephson junctions is relevant for quantum information technologies. Although bubbles of magnetic flux collapse under no external perturbation, this work shows that it can be stabilized by the insertion of a coaxial current dipole. These results provide a robust and general mechanism of control, trapping, injection, and breaking of magnetic flux bubbles.

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Why is it important?

Of the various qubits that have been implemented, fluxon qubits are of particular interest because of their potential suitability for scalability and integration in superconducting circuits. In this work, we demonstrate how to stabilize and introduce bubble fluxons in Josephson junctions using a coaxial dipole current. Our results suggest a promising way for the storage and transport of information in quantum information devices.

Perspectives

I'm particularly proud of this article, as we have used theoretical tools from nonlinear physics to understand complex phenomena in applied physics. I hope this article will encourage other scientists in the field to explore similar phenomena in related systems.

Juan Marin
Universidad de Santiago de Chile

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This page is a summary of: Stability of bubble-like fluxons in disk-shaped Josephson junctions in the presence of a coaxial dipole current, Chaos An Interdisciplinary Journal of Nonlinear Science, June 2020, American Institute of Physics, DOI: 10.1063/5.0006226.
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