论文标题
二维THZ光谱学中拓扑阶段的独特特征
Unique Signatures of Topological Phases in Two-Dimensional THz Spectroscopy
论文作者
论文摘要
我们开发了一种微观理论，用于一维拓扑超导体的二维光谱学。我们将环几何形状视为具有周期性边界条件的基塔夫链的实现。我们在数值上和分析上表明，2D光谱的交叉结构具有链的拓扑阶段的独特特征。我们的工作揭示了2D光谱如何识别大量特性中的拓扑阶段，从而绕开了由拓扑保护或琐碎的边界模式引起的能量特异性差异，而这些差异本来很难区分。
We develop a microscopic theory for the two-dimensional spectroscopy of one-dimensional topological superconductors. We consider a ring geometry as a realization of the Kitaev chain with periodic boundary conditions. We show numerically and analytically that the cross-peak structure of the 2D spectra carries unique signatures of the topological phases of the chain. Our work reveals how 2D spectroscopy can identify topological phases in bulk properties, bypassing energy-specific differences caused by topologically protected or trivial boundary modes that are otherwise hard to distinguish.
