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arXiv · 2203.03241

Magnetoelectric Cavity Magnonics in Skyrmion Crystals

Tomoki Hirosawa·Alexander Mook·Jelena Klinovaja·Daniel Loss
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Abstract

We present a theory of magnetoelectric magnon-photon coupling in cavities hosting noncentrosymmetric magnets. Analogously to nonreciprocal phenomena in multiferroics, the magnetoelectric coupling is time-reversal and inversion asymmetric. This asymmetry establishes a means for exceptional tunability of magnon-photon coupling, which can be switched on and off by reversing the magnetization direction. Taking the multiferroic skyrmion-host Cu$_2$OSeO$_3$ with ultralow magnetic damping as an example, we reveal the electrical activity of skyrmion eigenmodes and propose it for magnon-photon splitting of ``magnetically dark'' elliptic modes. Furthermore, we predict a cavity-induced magnon-magnon coupling between magnetoelectrically active skyrmion excitations. We discuss applications in quantum information processing by proposing protocols for all-electrical magnon-mediated photon quantum gates, and a photon-mediated SPLIT operation of magnons. Our study highlights magnetoelectric cavity magnonics as a novel platform for realizing quantum-hybrid systems and the coherent transduction between photons and magnons in topological magnetic textures.

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Tomoki Hirosawa, Alexander Mook, Jelena Klinovaja, Daniel Loss. 2022-03-07. Magnetoelectric Cavity Magnonics in Skyrmion Crystals. https://doi.org/10.1103/prxquantum.3.040321

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