Preparation of Distant Quantum Entanglement and One-way Quantum Steering in Hybrid Cavity-Magnonics-and-Cavity-Optomechanical Systems

A hybrid system that combines cavity magnonics and cavity optomechanics is proposed to facilitate the generation of long-distance entanglement and enable one-way steering between magnons and phonons. This configuration involves two directly coupled cavities, with one interacting with magnons and the other coupling with a mechanical oscillator (i.e., phonons). By driving the microwave cavity with a weak squeezed vacuum field generated by a flux-driven Josephson parametric amplifier, entanglement and one-way steering can be further enhanced. Moreover, the results demonstrate that magnon–phonon entanglement and one-way quantum steering exhibit robustness against temperature variations, which has significant implications for quantum information processing and storage.