Surface acoustic wave (SAW) devices are key components of classical communication systems and recently studied for quantum information processing. We here propose and study a hybrid quantum system composed of skyrmion qubit and a SAW cavity, which supports multiple long-lived phononic modes. The system allows for strong coupling between single skyrmion qubit and single phonon of different modes. By manipulating the qubit through a static magnetic field and a time-dependent modulation magnetic field, we further study the interaction between skyrmion qubit and individual phononic modes, phonon-phonon interaction, and qubit-qubit interaction, all operating in strong-coupling regime. The controllability of nanoscale skyrmion qubit and the dense phononic modes of single SAW cavity make our system have promising applications in large-scale chips for quantum communication and computing.

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• Acoustic phonons
• Hybrid quantum systems
• Skyrmions