Abrupt changes in the spectra of the Laplacian with constant complex magnetic field
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866909838358872064 |
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| author | Krejcirik, David Duc, Tho Nguyen Raymond, Nicolas |
| author_facet | Krejcirik, David Duc, Tho Nguyen Raymond, Nicolas |
| contents | We analyze the spectrum of the Laplace operator, subject to homogeneous complex magnetic fields in the plane. For real magnetic fields, it is well-known that the spectrum consists of isolated eigenvalues of infinite multiplicities (Landau levels). We demonstrate that when the magnetic field has a nonzero imaginary component, the spectrum expands to cover the entire complex plane. Additionally, we show that the Landau levels (appropriately rotated and now embedded in the complex plane) persists, unless the magnetic field is purely imaginary in which case they disappear and the spectrum becomes purely continuous. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_17419 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Abrupt changes in the spectra of the Laplacian with constant complex magnetic field Krejcirik, David Duc, Tho Nguyen Raymond, Nicolas Spectral Theory Mathematical Physics Analysis of PDEs Quantum Physics We analyze the spectrum of the Laplace operator, subject to homogeneous complex magnetic fields in the plane. For real magnetic fields, it is well-known that the spectrum consists of isolated eigenvalues of infinite multiplicities (Landau levels). We demonstrate that when the magnetic field has a nonzero imaginary component, the spectrum expands to cover the entire complex plane. Additionally, we show that the Landau levels (appropriately rotated and now embedded in the complex plane) persists, unless the magnetic field is purely imaginary in which case they disappear and the spectrum becomes purely continuous. |
| title | Abrupt changes in the spectra of the Laplacian with constant complex magnetic field |
| topic | Spectral Theory Mathematical Physics Analysis of PDEs Quantum Physics |
| url | https://arxiv.org/abs/2412.17419 |