Quasinormal modes of a charged loop quantum black hole
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arXiv
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2024
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| author | Zhu, Li-Gang Fu, Guoyang Li, Shulan Zhang, Dan Wu, Jian-Pin |
| author_facet | Zhu, Li-Gang Fu, Guoyang Li, Shulan Zhang, Dan Wu, Jian-Pin |
| contents | This study presents a systematic investigation of quasinormal modes (QNMs) for probe fields-massless/massive scalar and Dirac fields-around a charged loop quantum gravity black hole (LQG-BH) characterized by the quantum parameter $b_0$ and the charge parameter $Q$. Through spectral analysis of quasinormal frequencies (QNFs), we uncover a distinct overtone outburst driven by quantum gravity effects, prominently manifested in the scalar field spectrum with the multipole quantum number $l=0$. Both the outburst and its accompanying oscillatory patterns grow more pronounced with increasing overtone numbers. In contrast, massless scalar fields with $l>1$ and Dirac fields exhibit delayed outburst development, with non-monotonic behavior dominating the first two overtones. Notably, increasing the charge $Q$ universally suppresses quantum-gravity-induced features, including outbursts, non-monotonicity, and oscillations. Furthermore, we present evidence suggesting the presence of quasi-resonances in the massive scalar QNM spectrum, thereby illustrating the potential for the emergence of arbitrarily long-lived modes in this charged LQG spacetime. These findings establish a robust and universal interplay between quantum gravity effects and charge dynamics, providing new insights into the spectral properties of quantum-corrected BHs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_00543 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quasinormal modes of a charged loop quantum black hole Zhu, Li-Gang Fu, Guoyang Li, Shulan Zhang, Dan Wu, Jian-Pin General Relativity and Quantum Cosmology This study presents a systematic investigation of quasinormal modes (QNMs) for probe fields-massless/massive scalar and Dirac fields-around a charged loop quantum gravity black hole (LQG-BH) characterized by the quantum parameter $b_0$ and the charge parameter $Q$. Through spectral analysis of quasinormal frequencies (QNFs), we uncover a distinct overtone outburst driven by quantum gravity effects, prominently manifested in the scalar field spectrum with the multipole quantum number $l=0$. Both the outburst and its accompanying oscillatory patterns grow more pronounced with increasing overtone numbers. In contrast, massless scalar fields with $l>1$ and Dirac fields exhibit delayed outburst development, with non-monotonic behavior dominating the first two overtones. Notably, increasing the charge $Q$ universally suppresses quantum-gravity-induced features, including outbursts, non-monotonicity, and oscillations. Furthermore, we present evidence suggesting the presence of quasi-resonances in the massive scalar QNM spectrum, thereby illustrating the potential for the emergence of arbitrarily long-lived modes in this charged LQG spacetime. These findings establish a robust and universal interplay between quantum gravity effects and charge dynamics, providing new insights into the spectral properties of quantum-corrected BHs. |
| title | Quasinormal modes of a charged loop quantum black hole |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2410.00543 |