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Cavity magnonics with domain walls in insulating ferromagnetic wires

Mircea Trif1,* and Yaroslav Tserkovnyak2

  • 1International Research Centre MagTop, Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland
  • 2Department of Physics and Astronomy and Bhaumik Institute for Theoretical Physics, University of California, Los Angeles, California 90095, USA

  • *Contact author: mtrif@magtop.ifpan.edu.pl
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Phys. Rev. Research 8, 013243 – Published 5 March, 2026

DOI: https://doi.org/10.1103/h876-wl85

Abstract

Magnetic domain walls (DWs) are topological defects that host robust low-energy modes, which can be harnessed for classical and neuromorphic computing. However, accessing their quantum dynamics has remained an outstanding challenge. Using concepts from cavity optomechanics, we show that a geometric, Coriolis-type interaction between localized DWs and extended magnon modes in short insulating ferromagnetic wires enables efficient cooling of DWs to their quantum ground state and the preparation of nonclassical states with negative Wigner functions, detectable in the power spectrum of emitted magnons. We further demonstrate that magnons can mediate long-range entangling interactions between qubits encoded in spatially separated DWs, providing a route toward universal quantum gate operations. Our proposal relies solely on intrinsic degrees of freedom of the ferromagnet and naturally extends to ferrimagnets and antiferromagnets, as well as to other confined magnetic textures such as vortices and skyrmions in insulating nanostructures.

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References (40)

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Phys. Rev. Research 8, 013243– Published 5 March, 2026
  • Received 6 March 2024
  • Revised 19 September 2025
  • Accepted 30 January 2026
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