Title: Dynamically reconfigurable topological routing in nonlinear photonic systems Show Chinese title

Title: 非线性光子系统中的动态可重构拓扑路由

Abstract: The propagation path of topologically protected states is bound to the interface between regions with different topology, and as such, the functionality of linear photonic devices leveraging these states is fixed during fabrication. Here, we propose a mechanism for dynamic control over a driven dissipative system's local topology, yielding reconfigurable topological interfaces and thus tunable paths for protected routing. We illustrate our approach in non-resonantly pumped polariton lattices, where the nonlinear interaction between the polaritons and the exciton reservoir due to non-resonant pumping can yield a dynamical change of the topology. Moreover, using a continuous model of the polariton system based on a driven-dissipative Gross-Pitaevskii equation alongside the spectral localizer framework, we show that the local changes in the nonlinear non-Hermitian system's topology are captured by a local Chern marker. Looking forward, we anticipate such reconfigurable topological routing will enable the realization of novel classes of topological photonic devices. Show Chinese abstract

Abstract: 拓扑保护态的传播路径被限制在不同拓扑区域之间的界面，因此，利用这些态的线性光子器件的功能在制造过程中是固定的。 在这里，我们提出了一种机制，用于对驱动耗散系统的局部拓扑进行动态控制，从而产生可重构的拓扑界面，进而实现受保护路由的可调路径。 我们在非共振泵浦的极化子晶格中展示了我们的方法，其中由于非共振泵浦，极化子与激子库之间的非线性相互作用可以导致拓扑性的动态变化。 此外，使用基于驱动-耗散 Gross-Pitaevskii 方程的极化子系统的连续模型以及谱局部化器框架，我们表明非线性非厄米系统局部拓扑的变化由局部陈数标记所捕获。 展望未来，我们预期这种可重构的拓扑路由将能够实现新型拓扑光子器件。