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- W2606396296 abstract "We investigate the effects of non-Hermiticity on topological pumping, and uncover a connection between a topological edge invariant based on topological pumping and the winding numbers of exceptional points. In Hermitian lattices, it is known that the topologically nontrivial regime of the topological pump only arises in the infinite-system limit. In finite non-Hermitian lattices, however, topologically nontrivial behavior can also appear. We show that this can be understood in terms of the effects of encircling a pair of exceptional points during a pumping cycle. This phenomenon is observed experimentally, in a non-Hermitian microwave network containing variable gain amplifiers." @default.
- W2606396296 created "2017-04-28" @default.
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- W2606396296 date "2017-05-25" @default.
- W2606396296 modified "2023-10-12" @default.
- W2606396296 title "Exceptional points in a non-Hermitian topological pump" @default.
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- W2606396296 doi "https://doi.org/10.1103/physrevb.95.184306" @default.
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