Transport Effects in non-Hermitian Topological Models

The non-Hermitian topological model has been studied extensively in recent years; however, their transport features require further investigation. In this talk, we present a unifying analytical framework for identifying conditions for transport effects such as reflectionless and transparent transport, lasing, and coherent perfect absorption in topological non-Hermitian nonreciprocal systems. This provides a universal approach to studying the transport of tight-binding platforms, including higher-dimensional models and those with an internal degree of freedom going beyond the previously studied case of one-dimensional chains with nearest-neighbor couplings. For a paradigmatic ladder model, we will show how to adjust the transport effect by tuning the system's parameters.