Skyrmion Qubits: A New Class of Quantum Logic Elements Based on Nanoscale Magnetization

Abstract

We introduce a new class of primitive building blocks for realizing quantum logic elements based on nanoscale magnetization textures called skyrmions. In a skyrmion qubit, information is stored in the quantum degree of helicity, and the logical states can be adjusted by electric and magnetic fields, offering a rich operation regime with high anharmonicity. By exploring a large parameter space, we propose two skyrmion qubit variants depending on their quantized state. We discuss appropriate microwave pulses required to generate single-qubit gates for quantum computing, and skyrmion multiqubit schemes for a scalable architecture with tailored couplings. Scalability, controllability by microwave fields, operation time scales, and readout by nonvolatile techniques converge to make the skyrmion qubit highly attractive as a logical element of a quantum processor.

5 Pages, 3 Figures. Published in Phys. Rev. Lett. Featured in Physics, Editors' Suggestion

References in corpus (6)

• Quantum Computing
• Dynamics of domain walls in magnetic nanostrips
• Physical foundations and basic properties of magnetic skyrmions
• Magnetization dynamics and its scattering mechanism in thin CoFeB films with interfacial anisotropy
• Controlling the helicity of magnetic skyrmions by electrical field in frustrated magnets
• Quantum Depinning of a Magnetic Skyrmion

Cited by in corpus (5)

• Harnessing the Quantum Behavior of Spins on Surfaces
• Strain-Driven Zero-Field Near-10 nm Skyrmions in Two-Dimensional van der Waals Heterostructures
• Reversible Transformation between Isolated Skyrmions and Bimerons
• Anisotropic Dzyaloshinskii-Moriya interaction and topological magnetism in two-dimensional magnets protected by P4-m2 crystal symmetry
• Helicity locking of square skyrmion crystal in a centrosymmetric lattice system without vertical mirror symmetry