Weak Magnetic Sensing via Floquet Driving in an Active Cavity Magnon Coupled System
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866911597959577600 |
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| author | Yang, Fan Wang, Xudong Yan, Lijun Zhao, Yue Rao, Jinwei Bai, Lihui Yan, Shishen |
| author_facet | Yang, Fan Wang, Xudong Yan, Lijun Zhao, Yue Rao, Jinwei Bai, Lihui Yan, Shishen |
| contents | While significant advancements have been made in weak magnetic field detection, conventional high-sensitivity techniques are often limited by requirements for cryogenic operation or bulky setups. In this work, we develop a sensitive alternating magnetic field sensor based on a coupled system of an active microwave cavity and yttrium iron garnet (YIG), with the components implemented on printed circuit boards (PCBs). By introducing electrically tunable gain to compensate for cavity losses, we substantially improve both the quality factor and the signal intensity. Under the coupled system, Floquet modulation is induced by the alternating magnetic field, allowing for weak field detection by driving a specific hybrid mode and measuring the resulting Floquet sidebands. This miniaturized device operates at room temperature, achieving a detection limit of 121 pT/\sqrt{Hz}. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_14780 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Weak Magnetic Sensing via Floquet Driving in an Active Cavity Magnon Coupled System Yang, Fan Wang, Xudong Yan, Lijun Zhao, Yue Rao, Jinwei Bai, Lihui Yan, Shishen Mesoscale and Nanoscale Physics While significant advancements have been made in weak magnetic field detection, conventional high-sensitivity techniques are often limited by requirements for cryogenic operation or bulky setups. In this work, we develop a sensitive alternating magnetic field sensor based on a coupled system of an active microwave cavity and yttrium iron garnet (YIG), with the components implemented on printed circuit boards (PCBs). By introducing electrically tunable gain to compensate for cavity losses, we substantially improve both the quality factor and the signal intensity. Under the coupled system, Floquet modulation is induced by the alternating magnetic field, allowing for weak field detection by driving a specific hybrid mode and measuring the resulting Floquet sidebands. This miniaturized device operates at room temperature, achieving a detection limit of 121 pT/\sqrt{Hz}. |
| title | Weak Magnetic Sensing via Floquet Driving in an Active Cavity Magnon Coupled System |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2604.14780 |