Quasinormal modes of charged covariant effective black holes with a cosmological constant
- 1Guizhou University
Abstract
In this paper, we study the quasinormal modes of two covariant effective black holes characterized by the quantum parameter ζ, charge Q, and cosmological constant Λ, under the scalar perturbation. By employing the pseudo-spectral method, we numerically calculate the quasinormal frequencies and analyze the influence of ζ on the spectra with respect to Q. Our results demonstrate that while the quantum parameter ζ significantly modifies the quasinormal frequency spectrum, the non-monotonic behavior and overtone outbursts persist. Notably, the impact of quantum gravity on the overtone outbursts is not merely limited to enhancement or suppression; instead, it introduces additional spectral features. Furthermore, a comprehensive analysis of the full quasinormal mode spectrum reveals rich interactions between complex and purely imaginary modes, including damping-rate crossings and splitting-merging behavior. These phenomena typically accompany overtone outbursts in near-extremal regimes, suggesting a potential connection between mode interactions and outbursts. This work emphasizes the necessity of analyzing the full quasinormal frequency spectrum rather than focusing solely on fundamental modes, and provides novel insights into its underlying spectral structures.
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BibTeX
@article{dong2026quasinormal,
title = {{Quasinormal modes of charged covariant effective black holes with a cosmological constant}},
author = {Zhongzhinan Dong and Jinsong Yang},
journal = {The European Physical Journal C},
year = {2026},
month = oct,
doi = {10.1140/epjc/s10052-026-16409-1},
url = {https://link.springer.com/article/10.1140/epjc/s10052-026-16409-1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Quasinormal modes of charged covariant effective black holes with a cosmological constant
AU - Zhongzhinan Dong
AU - Jinsong Yang
PY - 2026
DA - 2026/10/29
JO - The European Physical Journal C
DO - 10.1140/epjc/s10052-026-16409-1
UR - https://link.springer.com/article/10.1140/epjc/s10052-026-16409-1
AB - In this paper, we study the quasinormal modes of two covariant effective black holes characterized by the quantum parameter ζ, charge Q, and cosmological constant Λ, under the scalar perturbation. By employing the pseudo-spectral method, we numerically calculate the quasinormal frequencies and analyze the influence of ζ on the spectra with respect to Q. Our results demonstrate that while the quantum parameter ζ significantly modifies the quasinormal frequency spectrum, the non-monotonic behavior and overtone outbursts persist. Notably, the impact of quantum gravity on the overtone outbursts is not merely limited to enhancement or suppression; instead, it introduces additional spectral features. Furthermore, a comprehensive analysis of the full quasinormal mode spectrum reveals rich interactions between complex and purely imaginary modes, including damping-rate crossings and splitting-merging behavior. These phenomena typically accompany overtone outbursts in near-extremal regimes, suggesting a potential connection between mode interactions and outbursts. This work emphasizes the necessity of analyzing the full quasinormal frequency spectrum rather than focusing solely on fundamental modes, and provides novel insights into its underlying spectral structures.
SN - 1434-6052
SN - 1434-6044
ER -