Abstract
The conditions for the emergence of the non-Hermitian skin effect,as a unique physical response of non-Hermitian systems,have now become one of the hot research topics.In this paper,we study the novel physical responses of non-Hermitian systems with anomalous time-reversal symmetry,in both one dimension and two dimensions.Specifically,we focus on whether the systems will exhibit a non-Hermitian skin effect.We employ the theory of generalized Brillouin zone and also numerical methods to show that the anomalous time-reversal symmetry can prevent the skin effect in one-dimensional non-Hermitian systems,but is unable to exert the same effectiveness in two-dimensional cases.
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