Abstract
Unidirectional reflectionlessness is investigated in a non-Hermitian quantum system that consists of two plasmonic cavities (PCs) coupled to a plasmonic waveguide. By appropriately adjusting the phase shift and decay rate of two PCs, unidirectional reflectionlessness is obtained at exceptional points. And the bilateral unidirectional reflectionless propagation can be manipulated in a wide range of decay rate. Moreover, high non-reciprocal entanglement between two PCs is obtained under the appropriate phase shift and decay rate of two PCs.
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