Gain- and Loss-Induced Topological Insulating Phase in a Non-Hermitian Electrical Circuit
Gain- and Loss-Induced Topological Insulating Phase in a Non-Hermitian Electrical Circuit
There have been considerable efforts devoted to the study of topological phases in certain non-Hermitian systems that possess real eigenfrequencies in the presence of gain and loss. However, it is challenging to experimentally realize such non-Hermitian topological insulators in either quantum or photonic systems, due to the difficulties in introducing …