论文标题
波导镁的巨型旋转合奏
Giant spin ensembles in waveguide magnonics
论文作者
论文摘要
通常采用偶极子近似来描述在普通条件下的光结合相互作用。随着人工原子系统的发展，“巨型原子”物理学是可能的，其中原子的尺度可与它们与之相互作用的光的波长相当甚至更大，而偶极近似不再有效。它揭示了小原子不可能的有趣物理，并且可能提供有用的应用。在这里，我们在实验上证明了巨型自旋集合（GSE），其中铁磁自旋组与蜿蜒的波导相互作用两次，并且可以通过变化频率将它们之间的耦合强度从有限（耦合）到零（脱钩）连续调节。在嵌套配置中，我们研究了两个GSE的集体行为，并找到了在常规系统中无法观察到的非凡现象。我们的实验为“巨型原子”物理学提供了一个新的平台。
The dipole approximation is usually employed to describe light-matter interactions under ordinary conditions. With the development of artificial atomic systems, `giant atom' physics is possible, where the scale of atoms is comparable to or even greater than the wavelength of the light they interact with, and the dipole approximation is no longer valid. It reveals interesting physics impossible in small atoms and may offer useful applications. Here, we experimentally demonstrate the giant spin ensemble (GSE), where a ferromagnetic spin ensemble interacts twice with the meandering waveguide, and the coupling strength between them can be continuously tuned from finite (coupled) to zero (decoupled) by varying the frequency. In the nested configuration, we investigate the collective behavior of two GSEs and find extraordinary phenomena that cannot be observed in conventional systems. Our experiment offers a new platform for `giant atom' physics.
