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arXiv · 2501.02462

Floquet engineering in hybrid magnetic quantum systems

Feng-Zhou Ji·Si-Yuan Bai·Wan-Li Yang·Chun-Jie Yang·Jun-Hong An
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Abstract

The advancement of magnonics has facilitated the utilization of hybrid magnetic systems in quantum technologies. A hybrid magnetic lattice formed by an array of superconducting loops and magnetic particles has been devised as a quantum bus to disseminate quantum resources among magnetic quantum entities serving as nodes of a quantum network. However, the lattice also exerts a decoherence effect on the quantum entities, which impairs its practical performance. By studying the non-Markovian dynamics of nitrogen-vacancy centers and magnon modes coupled to two independent hybrid magnetic lattices, we propose a Floquet-engineering scheme via periodic driving on the quantum entities to suppress decoherence. We find that significant steady-state entanglement is preserved when a Floquet bound state exists in the quasienergy spectrum of the system consisting of each driven quantum entity and its lattice. This result enables a precise manipulation of hybrid magnetic systems and benefits their applications in quantum networks.

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Feng-Zhou Ji, Si-Yuan Bai, Wan-Li Yang, Chun-Jie Yang, Jun-Hong An. 2026-09-11. Floquet engineering in hybrid magnetic quantum systems. https://doi.org/10.1038/s42005-026-02695-4

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