Absorption and quasinormal modes by rotating acoustic black holes in Lorentz-violating background
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866911574065676288 |
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| author | Campos, J. A. V. Anacleto, M. A. Brito, F. A. Passos, E. Queiroz, Amilcar R. |
| author_facet | Campos, J. A. V. Anacleto, M. A. Brito, F. A. Passos, E. Queiroz, Amilcar R. |
| contents | In this work, we investigate the effects of Lorentz symmetry violation on the absorption cross section and quasinormal modes of a rotating acoustic black hole in (2+1) dimensions. The absorption cross section was analyzed analytically, using the low and high frequency regimes, and numerically, through integration of the radial equation. The results showed that Lorentz violation increases the absorption cross section at all energy scales, with a contribution from the rotation parameter $B$ appearing even in the low frequency regime. For the quasinormal modes, we observed that symmetry breaking decreases the real part of the frequencies and increases the magnitude of the corresponding imaginary part, indicating a faster damping of the oscillations. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_06137 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Absorption and quasinormal modes by rotating acoustic black holes in Lorentz-violating background Campos, J. A. V. Anacleto, M. A. Brito, F. A. Passos, E. Queiroz, Amilcar R. General Relativity and Quantum Cosmology High Energy Physics - Theory In this work, we investigate the effects of Lorentz symmetry violation on the absorption cross section and quasinormal modes of a rotating acoustic black hole in (2+1) dimensions. The absorption cross section was analyzed analytically, using the low and high frequency regimes, and numerically, through integration of the radial equation. The results showed that Lorentz violation increases the absorption cross section at all energy scales, with a contribution from the rotation parameter $B$ appearing even in the low frequency regime. For the quasinormal modes, we observed that symmetry breaking decreases the real part of the frequencies and increases the magnitude of the corresponding imaginary part, indicating a faster damping of the oscillations. |
| title | Absorption and quasinormal modes by rotating acoustic black holes in Lorentz-violating background |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2604.06137 |