Magnetoelectric Cavity Magnonics in Skyrmion Crystals

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.

19 pages, 17 figures. Accepted version for PRX Quantum

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Cited by in corpus (9)

• Skyrmion Qubits: Challenges For Future Quantum Computing Applications
• Colloquium: Quantum Properties and Functionalities of Magnetic Skyrmions
• Magnon-Skyrmion Hybrid Quantum Systems: Tailoring Interactions via Magnons
• Towards an experimental proof of the magnonic Aharonov$-$Casher effect
• Second-order correlation and squeezing of photons in cavities with ultrastrong magnon-photon interactions
• Momentum-space theory for topological magnons in 2D ferromagnetic skyrmion lattices
• ${\mathbb{Z}}_2$ Vortex Crystals in Tetrahedral Antiferromagnets: Fractional Charges and Topological Magnons
• Impact of the honeycomb spin-lattice on topological magnons and edge states in ferromagnetic 2D skyrmion crystals
• Topological Magnon-Plasmon Hybrids