Multiple scattering theory of non-Hermitian sonic second-order topological insulators
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Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
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comunitat-uji-handle3:10234/43643
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INVESTIGACIONMetadatos
Título
Multiple scattering theory of non-Hermitian sonic second-order topological insulatorsFecha de publicación
2019-10-25ISSN
2399-3650Cita bibliográfica
Rosendo López, M., Zhang, Z., Torrent, D. et al. Multiple scattering theory of non-Hermitian sonic second-order topological insulators. Commun Phys 2, 132 (2019) doi:10.1038/s42005-019-0233-6Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://www.nature.com/articles/s42005-019-0233-6Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Topological phases of sound enable unconventional confinement of acoustic energy at the corners in higher-order topological insulators. These unique states which go beyond the conventional bulk-boundary correspondence ... [+]
Topological phases of sound enable unconventional confinement of acoustic energy at the corners in higher-order topological insulators. These unique states which go beyond the conventional bulk-boundary correspondence have recently been extended to non-Hermitian wave physics comprising finite crystal structures including loss and gain units. We use a multiple scattering theory to calculate these topologically trapped complex states that agree very well to finite element predictions. Moreover, our semi-numerical tool allows us to compute the spectral dependence of corner states in the presence of defects, illustrating the limits of the topological resilience of these confined non-Hermitian acoustic states. [-]
Publicado en
Communications Physics, 2019, vol. 2, no 1Proyecto de investigación
European Research Council (ERC): 714577; MINECO through a Ramon y Cajal grant: RYC-2015-17156, RYC-2016-21188; Ministry of Science, Innovation and Universities: RTI2018-093921-A-C42Derechos de acceso
info:eu-repo/semantics/openAccess
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