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- W4224281152 abstract "Decoherence and non-Hermiticity are two different effects of the open quantum systems. Both of them have triggered many interesting phenomena. In this paper, we theoretically study an open two-level non-Hermitian system coupling to a dissipative environment by solving the vectorized Lindblad equation. This scheme provides us a powerful framework to address widespread open systems with gain, loss and dissipation. Our results show that there exist a new class of exceptional points (EPs) and steady states due to the interplay between non-Hermiticity and decoherence. Furthermore, we also demonstrate new-type topological properties of eigenstates with zero real-part of eigenvalues ($Re[lambda]=0$) which are corresponding to Fermi arcs. It is revealed that the phases of eigenstates located in Fermi arcs regime have a topological phase $|pi/2|$ which is totally unaffected by the dissipative environment. Our results provide a promising approach for further uncovering and understanding the intriguing properties of non-Hermitian open systems." @default.
- W4224281152 created "2022-04-26" @default.
- W4224281152 creator A5067593763 @default.
- W4224281152 creator A5073344667 @default.
- W4224281152 date "2022-05-01" @default.
- W4224281152 modified "2023-09-26" @default.
- W4224281152 title "Unconventional steady states and topological phases in an open two-level non-Hermitian system" @default.
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- W4224281152 doi "https://doi.org/10.1088/1367-2630/ac69b2" @default.
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