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- W4287759234 abstract "Wave scattering structures with amplification and dissipation can be modelled by non-Hermitian systems, opening new ways to control waves at small length scales. In this work, we study the phenomenon of topologically protected edge states in acoustic systems with gain and loss. We demonstrate that localized edge modes appear in a periodic structure of subwavelength resonators with a defect in the gain/loss distribution, and explicitly compute the corresponding frequency and decay length. Similarly to the Hermitian case, these edge modes can be attributed to the winding of the eigenmodes. In the non-Hermitian case, the topological invariants fail to be quantized, but can nevertheless predict the existence of localized edge modes." @default.
- W4287759234 created "2022-07-26" @default.
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- W4287759234 date "2020-06-10" @default.
- W4287759234 modified "2023-10-14" @default.
- W4287759234 title "Edge modes in active systems of subwavelength resonators" @default.
- W4287759234 doi "https://doi.org/10.48550/arxiv.2006.05719" @default.
- W4287759234 hasPublicationYear "2020" @default.
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