论文标题
相互作用诱导的非热拓扑阶段来自动力学轨道
Interaction-induced non-Hermitian topological phases from a dynamical gauge field
论文作者
论文摘要
我们提出了一个最小的非热模型，其中托有粒子间相互作用诱导了拓扑非平凡的复杂能谱。我们的模型由具有密度依赖性的动力学非热仪场的一维链组成。对于单个粒子系统，该模型在拓扑上是微不足道的，但是当系统中存在两个或多个粒子时，表现出具有点间隙的非平凡的非铁拓扑。我们构建了一个有效的Doublon模型，以描述两个粒子存在的非平凡拓扑，它们与完整的相互作用模型一致。我们的模型可以通过调节Hatano-Nelson模型的跳跃来实现；我们提供了一个具体的浮雕协议，以实现原子和光学设置中的模型。
We present a minimal non-Hermitian model where a topologically nontrivial complex energy spectrum is induced by inter-particle interactions. Our model consists of a one-dimensional chain with a dynamical non-Hermitian gauge field with density dependence. The model is topologically trivial for a single particle system, but exhibits nontrivial non-Hermitian topology with a point gap when two or more particles are present in the system. We construct an effective doublon model to describe the nontrivial topology in the presence of two particles, which quantitatively agrees with the full interacting model. Our model can be realized by modulating hoppings of the Hatano-Nelson model; we provide a concrete Floquet protocol to realize the model in atomic and optical settings.
