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Maximal scarring for eigenfunctions of quantum graphs
We prove the existence of scarred eigenstates for star graphs with scattering matrices at the central vertex which are either a Fourier transform matrix, or a matrix that prohibits back-scattering. We prove the existence of scars that are half-delocalised on a single bond. Moreover we show that the...
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| Format: | Default Article |
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2018
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| Online Access: | https://hdl.handle.net/2134/34066 |
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| _version_ | 1818169497799884800 |
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| author | G. Berkolaiko Brian Winn |
| author_facet | G. Berkolaiko Brian Winn |
| author_sort | G. Berkolaiko (7159685) |
| collection | Figshare |
| description | We prove the existence of scarred eigenstates for star graphs with scattering matrices at the central vertex which are either a Fourier transform matrix, or a matrix that prohibits back-scattering. We prove the existence of scars that are half-delocalised on a single bond. Moreover we show that the scarred states we construct are maximal in the sense that it is impossible to have quantum eigenfunctions with a significantly lower entropy than our examples. These scarred eigenstates are on graphs that exhibit generic spectral statistics of random matrix type in the large graph limit, and, in contrast to other constructions, correspond to non-degenerate eigenvalues; they exist for almost all choices of lengths |
| format | Default Article |
| id | rr-article-9377333 |
| institution | Loughborough University |
| publishDate | 2018 |
| record_format | Figshare |
| spelling | rr-article-93773332018-09-12T00:00:00Z Maximal scarring for eigenfunctions of quantum graphs G. Berkolaiko (7159685) Brian Winn (1247334) Other mathematical sciences not elsewhere classified untagged Mathematical Sciences not elsewhere classified We prove the existence of scarred eigenstates for star graphs with scattering matrices at the central vertex which are either a Fourier transform matrix, or a matrix that prohibits back-scattering. We prove the existence of scars that are half-delocalised on a single bond. Moreover we show that the scarred states we construct are maximal in the sense that it is impossible to have quantum eigenfunctions with a significantly lower entropy than our examples. These scarred eigenstates are on graphs that exhibit generic spectral statistics of random matrix type in the large graph limit, and, in contrast to other constructions, correspond to non-degenerate eigenvalues; they exist for almost all choices of lengths 2018-09-12T00:00:00Z Text Journal contribution 2134/34066 https://figshare.com/articles/journal_contribution/Maximal_scarring_for_eigenfunctions_of_quantum_graphs/9377333 CC BY-NC-ND 4.0 |
| spellingShingle | Other mathematical sciences not elsewhere classified untagged Mathematical Sciences not elsewhere classified G. Berkolaiko Brian Winn Maximal scarring for eigenfunctions of quantum graphs |
| title | Maximal scarring for eigenfunctions of quantum graphs |
| title_full | Maximal scarring for eigenfunctions of quantum graphs |
| title_fullStr | Maximal scarring for eigenfunctions of quantum graphs |
| title_full_unstemmed | Maximal scarring for eigenfunctions of quantum graphs |
| title_short | Maximal scarring for eigenfunctions of quantum graphs |
| title_sort | maximal scarring for eigenfunctions of quantum graphs |
| topic | Other mathematical sciences not elsewhere classified untagged Mathematical Sciences not elsewhere classified |
| url | https://hdl.handle.net/2134/34066 |