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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2401.12626 |
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| _version_ | 1866929219927277568 |
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| author | Ammari, Habib Barandun, Silvio De Bruijn, Yannick Liu, Ping Thalhammer, Clemens |
| author_facet | Ammari, Habib Barandun, Silvio De Bruijn, Yannick Liu, Ping Thalhammer, Clemens |
| contents | We establish new results on the spectra and pseudo-spectra of tridiagonal $k$-Toeplitz operators and matrices. In particular, we prove the connection between the winding number of the eigenvalues of the symbol function and the exponential decay of the associated eigenvectors (or pseudo-eigenvectors). Our results elucidate the topological origin of the non-Hermitian skin effect in general one-dimensional polymer systems of subwavelength resonators with imaginary gauge potentials, proving the observation and conjecture in arXiv:2307.13551. We also numerically verify our theory for these systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_12626 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Spectra and pseudo-spectra of tridiagonal $k$-Toeplitz matrices and the topological origin of the non-Hermitian skin effect Ammari, Habib Barandun, Silvio De Bruijn, Yannick Liu, Ping Thalhammer, Clemens Mathematical Physics Materials Science Rings and Algebras Optics 15A18, 15B05, 81Q12 We establish new results on the spectra and pseudo-spectra of tridiagonal $k$-Toeplitz operators and matrices. In particular, we prove the connection between the winding number of the eigenvalues of the symbol function and the exponential decay of the associated eigenvectors (or pseudo-eigenvectors). Our results elucidate the topological origin of the non-Hermitian skin effect in general one-dimensional polymer systems of subwavelength resonators with imaginary gauge potentials, proving the observation and conjecture in arXiv:2307.13551. We also numerically verify our theory for these systems. |
| title | Spectra and pseudo-spectra of tridiagonal $k$-Toeplitz matrices and the topological origin of the non-Hermitian skin effect |
| topic | Mathematical Physics Materials Science Rings and Algebras Optics 15A18, 15B05, 81Q12 |
| url | https://arxiv.org/abs/2401.12626 |