We theoretically study the role of the exceptional point (EP) in a non-Hermitian cavity magnomechanical (CMM) system, with a tunable dissipative magnon-photon coupling. We find that the EP emerging in such a system can radically change the properties of photons and phonons. As a result, flexible on-off optical transmission, coherent switching of slow and fast lights, and enhanced mechanical cooling deep into the ground state can be achievable by approaching the EP. Detailed comparisons between this system and its Hermitian counterpart are given. Our results show that EP-assisted CMM devices can serve as tools for applications in optical communications and electromechanical switching or sensing.

中文翻译：

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特殊点设计的腔体磁力学

我们从理论上研究了异常点 (EP) 在非厄米腔磁力学 (CMM) 系统中的作用，具有可调谐的耗散磁振子-光子耦合。我们发现在这样的系统中出现的 EP 可以从根本上改变光子和声子的特性。因此，通过接近 EP 可以实现灵活的开关光传输、慢光和快光的相干切换以及深入到基态的增强机械冷却。给出了该系统与其 Hermitian 对应系统之间的详细比较。我们的结果表明，EP 辅助 CMM 设备可以作为光通信和机电开关或传感应用的工具。