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 a number of long-lived phononic modes. The results show that the system allows for strong coupling between skyrmion qubit and single phonon of different modes. By manipulating the qubit(s) 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, which operates in strong-coupling regime. The controllability of nanoscale skyrmion qubit and the dense phononic modes of single SAW cavity would make our system have promising applications in large-scale quantum communication and computing.
Cite
@article{arxiv.2503.06841,
title = {Hybrid quantum surface acoustic wave with skyrmion qubit for quantum information processing},
author = {Yu-Yuan Chen and Zhihui Peng and Yu-xi Liu},
journal= {arXiv preprint arXiv:2503.06841},
year = {2026}
}