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

Christina Psaroudaki and Christos Panagopoulos
Phys. Rev. Lett. 127, 067201 – Published 4 August 2021
Physics logo See synopsis: Magnetic Skyrmions Could Act as Qubits
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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.

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  • Received 30 March 2021
  • Accepted 30 June 2021

DOI:https://doi.org/10.1103/PhysRevLett.127.067201

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

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Magnetic Skyrmions Could Act as Qubits

Published 4 August 2021

Predictions suggest that magnetic quasiparticles known as skyrmions could provide the basis for a novel quantum-computing platform.

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Authors & Affiliations

Christina Psaroudaki1,2,* and Christos Panagopoulos3,†

  • 1Department of Physics and Institute for Quantum Information and Matter, California Institute of Technology, Pasadena, California 91125, USA
  • 2Institute for Theoretical Physics, University of Cologne, D-50937 Cologne, Germany
  • 3Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link 637371, Singapore

  • *cpsaroud@caltech.edu
  • christos@ntu.edu.sg

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Issue

Vol. 127, Iss. 6 — 6 August 2021

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