论文标题
界面反射异常移位的量化循环
Quantized Circulation of Anomalous Shift in Interface Reflection
论文作者
论文摘要
当粒子梁在界面上反射时可能会发生异常的空间移位。移位形成在二维接口动量空间中定义的向量场。我们表明，尽管单个动量处的移位向量通常对系统细节敏感，但其沿近距离循环（即其循环）的组成部分可能会在某些对称的感兴趣条件下产生可靠的量化数量。特别是，当梁从琐碎的介质中入射时，这种情况就是这种情况，然后量化的异常移位循环（CAS）直接表现出其他培养基的拓扑特征。我们证明，可以通过CAS捕获和区分超导体的Weyl介质的拓扑电荷以及非常规的对。我们的作品在无处不在的物理过程中揭示了隐藏的量化功能，这也可能提供了一种新的探索拓扑介质的方法。
A particle beam may undergo an anomalous spatial shift when it is reflected at an interface. The shift forms a vector field defined in the two-dimensional interface momentum space. We show that, although the shift vector at individual momentum is typically sensitive to the system details, its integral along a close loop, i.e., its circulation, could yield a robust quantized number under certain symmetry conditions of interest. Particularly, this is the case when the beam is incident from a trivial medium, then the quantized circulation of anomalous shift (CAS) directly manifests the topological character of the other medium. We demonstrate that the topological charge of a Weyl medium as well as the unconventional pair potentials of a superconductor can be captured and distinguished by CAS. Our work unveils a hidden quantized feature in a ubiquitous physical process, which may also offer a new approach for probing topological media.
