Stabilization and control of Majorana bound states with elongated skyrmions

TL;DR

This paper proposes a method to host and manipulate Majorana bound states using elongated skyrmions in a layered magnetic and superconducting system, enabling quantum information transfer and braiding operations.

Contribution

It introduces a novel approach to stabilize and control Majorana states with elongated skyrmions in a multilayer structure, facilitating quantum operations.

Findings

Elongated skyrmions can host Majorana bound states.

Skyrmion motion enables quantum information transfer.

Braiding operations can be implemented in the proposed system.

Abstract

We show that elongated magnetic skyrmions can host Majorana bound states in a proximity-coupled two-dimensional electron gas sandwiched between a chiral magnet and an $s$-wave superconductor. Our proposal requires stable skyrmions with unit topological charge, which can be realized in a wide range of multilayer magnets, and allows quantum information transfer by using standard methods in spintronics via skyrmion motion. We also show how braiding operations can be realized in our proposal.