作者：Pei-Xin Shen Vivien Perrin Mircea Trif Pascal Simon
沉积在超导体表面的一系列磁性杂质形成了一个拓扑Shiba带，该带支持Majorana零模，适合拓扑量子计算。然而，大多数研究零模式的实验都依赖于传输测量，而传输测量只捕捉局部特性。在这里，我们建议利用磁性纯度的内在动力学来访问它们的非局部特性。我们使用线性响应理论来确定在外部$ac$磁场和与Shiba电子耦合的情况下均匀磁振子模式的动力学。我们证明，这种分布在整个原子链上的模式，被基态的宇称所印记，而且，可以在位于链末端的Majorana和平凡零模式之间进行区分。我们的方法为用于探测Majorana零模的扫描隧道显微镜技术提供了一种非侵入性的替代方案。相反，磁振子可以促进
A chain of magnetic impurities deposited on the surface of a superconductorcan form a topological Shiba band that supports Majorana zero modes and hold apromise for topological quantum computing. Yet, most experiments scrutinizingthese zero modes rely on transport measurements, which only capture localproperties. Here we propose to leverage the intrinsic dynamics of the magneticimpurities to access their non-local character. We use linear response theoryto determine the dynamics of the uniform magnonic mode in the presence ofexternal $ac$ magnetic fields and the coupling to the Shiba electrons. Wedemonstrate that this mode, which spreads over the entire chain of atoms,becomes imprinted with the parity of the ground state and, moreover, candiscriminate between Majorana and trivial zero modes located at the end of thechain. Our approach offers a non-invasive alternative to the scanningtunnelling microscopy techniques used to probe Majorana zero modes. Conversely,the magnons could facilitate the manipulation of Majorana zero modes intopological Shiba chains.
论文链接：http://arxiv.org/pdf/2303.13513v1
更多计算机论文：http://cspaper.cn/