Non-self-adjoint Dirac operators on graphs
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866916677921275904 |
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| author | Holzmann, Markus Růžek, Václav Tušek, Matěj |
| author_facet | Holzmann, Markus Růžek, Václav Tušek, Matěj |
| contents | In this paper we introduce and study generally non-self-adjoint realizations of the Dirac operator on an arbitrary finite metric graph. Employing the robust boundary triple framework, we derive, in particular, a variant of the Birman Schwinger principle for its eigenvalues, and with an example of a star shaped graph we show that the point spectrum may exhibit diverse behaviour. Subsequently, we find sufficient and necessary conditions on transmission conditions at the graph's vertices under which the Dirac operator on the graph is symmetric with respect to the parity, the time reversal, or the charge conjugation transformation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_00480 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Non-self-adjoint Dirac operators on graphs Holzmann, Markus Růžek, Václav Tušek, Matěj Mathematical Physics Spectral Theory Quantum Physics 81Q35, 81Q12 In this paper we introduce and study generally non-self-adjoint realizations of the Dirac operator on an arbitrary finite metric graph. Employing the robust boundary triple framework, we derive, in particular, a variant of the Birman Schwinger principle for its eigenvalues, and with an example of a star shaped graph we show that the point spectrum may exhibit diverse behaviour. Subsequently, we find sufficient and necessary conditions on transmission conditions at the graph's vertices under which the Dirac operator on the graph is symmetric with respect to the parity, the time reversal, or the charge conjugation transformation. |
| title | Non-self-adjoint Dirac operators on graphs |
| topic | Mathematical Physics Spectral Theory Quantum Physics 81Q35, 81Q12 |
| url | https://arxiv.org/abs/2502.00480 |