2026/04/30 by J. A. V. Campos, M. A. Anacleto, F. A. Brito +2
Physics and Astronomy · #gr-qc #hep-th
Latex, 16 pages, 10 figures, 2 tables; this version agrees with accepted version in Annals of Physics
arxiv created 2026/07/29 · arxiv updated 2026/07/30
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, within the regime of slow rotation and small Lorentz violating parameter α. 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, in this regime, 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.