论文标题
无辐射和非铁拓扑的芯片木元素的惯性缺陷状态
Radiation-free and non-Hermitian topology inertial defect states of on-chip magnons
论文作者
论文摘要
辐射阻尼是与传播光子，电子或声子杂交的量子发射器的强大耗散源，对于片上磁性发射器而言，也不太容易避免，并且可以通过底物的表面声波辐射。在这里，我们在一系列芯片纳米磁磁铁中演示，通过交换表面声波，阵列中的一个点缺陷可以通过局部巨元的频率转移来引入局部偏见的磁场，或者通过磁性线的缺乏，与磁通量相反，与良好的元素相反，将磁线固定在良好的范围中，使其与良好的元素相反。镁缺损状态的辐射被缺陷到阵列边缘的距离逐个抑制。此外，这种缺陷状态对于将所有扩展状态定位在一个边界处的非富尔米特拓扑非常惯用。这种构型稳健的磁化缺陷状态针对无辐射极限可能适用于将来的芯片磁岩设备中的高保真镁量子信息存储。
Radiative damping is a strong dissipation source for the quantum emitters hybridized with propagating photons, electrons, or phonons, which is not easily avoidable for on-chip magnonic emitters as well that can radiate via the surface acoustic waves of the substrate. Here we demonstrate in an array of on-chip nano-magnets coupled in a long range via exchanging the surface acoustic waves that a point defect in the array, which can be introduced by the local magnon frequency shift by a local biased magnetic field or the absence of a magnetic wire, strongly localizes the magnons, in contrast to the well spreading Bloch-like collective magnon modes in such an array setting. The radiation of the magnon defect states is exponentially suppressed by the distance of the defect to the array edges. Moreover, this defect state is strikingly inertial to the non-Hermitian topology that localizes all the extended states at one boundary. Such configuration robust magnon defect states towards radiation-free limit may be suitable for high-fidelity magnon quantum information storage in the future on-chip magnonic devices.
