论文标题
活动弹性介质中的非热带拓扑和皮肤模式
Non-Hermitian band topology and skin modes in active elastic media
论文作者
论文摘要
由活性成分构建的固体可以表现出非晶状体弹性系数，从而引起非富米波现象。在这里，我们研究了在二维主动弹性介质的边界处存在的非热效应，这些媒体服从了两个一般假设：它们的显微力量保留线性动量，仅由静态变形引起。使用Continuum方程，我们证明了非铁皮皮肤效应的存在，其中边界具有大量的局部模式。此外，晶格模型揭示了由单个键的活性水平驱动的特殊环介导的非拓扑拓扑转变。
Solids built out of active components can exhibit non-reciprocal elastic coefficients that give rise to non-Hermitian wave phenomena. Here, we investigate non-Hermitian effects present at the boundary of two-dimensional active elastic media obeying two general assumptions: their microscopic forces conserve linear momentum and arise only from static deformations. Using continuum equations, we demonstrate the existence of the non-Hermitian skin effect in which the boundary hosts an extensive number of localized modes. Furthermore, lattice models reveal non-Hermitian topological transitions mediated by exceptional rings driven by the activity level of individual bonds.
