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Charged superradiant instability of spherically symmetric regular black holes in de Sitter spacetime: time- and frequency-domain analysis.

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Title: Charged superradiant instability of spherically symmetric regular black holes in de Sitter spacetime: time- and frequency-domain analysis.
Authors: Zhan, Yizhi1,2 (AUTHOR) niannian_12138@163.com, Xu, Hengyu1,2 (AUTHOR) xuhengyu0501@outlook.com, Chen, Haowei1,2 (AUTHOR) chenhaowei@zjut.edu.cn, Zhang, Shao-Jun1,2 (AUTHOR) sjzhang@zjut.edu.cn
Source: European Physical Journal C -- Particles & Fields. May2026, Vol. 86 Issue 5, p1-11. 11p.
Subjects: Black holes, Spacetime, Frequency-domain analysis, Time-domain analysis, Electrodynamics
Abstract: We investigate the superradiant instability of Ayón-Beato–García–de Sitter (ABG-dS) black holes under charged scalar field perturbations, employing both time-domain evolutions and frequency-domain computations. We demonstrate that the instability manifests exclusively for the spherically symmetric mode with ℓ = 0 for both massless and massive scalar field perturbations. In contrast, asymptotically flat ABG black holes remain stable in the massless limit, a finding that highlights the crucial role of the cosmological horizon in providing a confining boundary. We further analyze the dependence of the instability growth rate on the cosmological constant Λ , the black hole charge Q, the scalar field charge q, and the scalar field mass μ. We find that the growth rate peaks at intermediate values of Λ and q, and increases monotonically with Q. Conversely, an increase in the scalar field mass μ suppresses the instability, eventually quenching it when μ is sufficiently large. Compared with Reissner–Nordström–de Sitter black holes, ABG-dS black holes exhibit distinct instability characteristics, which arise from the modified electrostatic potential induced by nonlinear electrodynamics. [ABSTRACT FROM AUTHOR]
Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Charged superradiant instability of spherically symmetric regular black holes in de Sitter spacetime: time- and frequency-domain analysis.
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  Data: <searchLink fieldCode="AR" term="%22Zhan%2C+Yizhi%22">Zhan, Yizhi</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> niannian_12138@163.com</i><br /><searchLink fieldCode="AR" term="%22Xu%2C+Hengyu%22">Xu, Hengyu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> xuhengyu0501@outlook.com</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Haowei%22">Chen, Haowei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> chenhaowei@zjut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Shao-Jun%22">Zhang, Shao-Jun</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> sjzhang@zjut.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22European+Physical+Journal+C+--+Particles+%26+Fields%22">European Physical Journal C -- Particles & Fields</searchLink>. May2026, Vol. 86 Issue 5, p1-11. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Black+holes%22">Black holes</searchLink><br /><searchLink fieldCode="DE" term="%22Spacetime%22">Spacetime</searchLink><br /><searchLink fieldCode="DE" term="%22Frequency-domain+analysis%22">Frequency-domain analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Time-domain+analysis%22">Time-domain analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Electrodynamics%22">Electrodynamics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: We investigate the superradiant instability of Ayón-Beato–García–de Sitter (ABG-dS) black holes under charged scalar field perturbations, employing both time-domain evolutions and frequency-domain computations. We demonstrate that the instability manifests exclusively for the spherically symmetric mode with ℓ = 0 for both massless and massive scalar field perturbations. In contrast, asymptotically flat ABG black holes remain stable in the massless limit, a finding that highlights the crucial role of the cosmological horizon in providing a confining boundary. We further analyze the dependence of the instability growth rate on the cosmological constant Λ , the black hole charge Q, the scalar field charge q, and the scalar field mass μ. We find that the growth rate peaks at intermediate values of Λ and q, and increases monotonically with Q. Conversely, an increase in the scalar field mass μ suppresses the instability, eventually quenching it when μ is sufficiently large. Compared with Reissner–Nordström–de Sitter black holes, ABG-dS black holes exhibit distinct instability characteristics, which arise from the modified electrostatic potential induced by nonlinear electrodynamics. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1140/epjc/s10052-026-15732-x
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        Text: English
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        Type: general
      – SubjectFull: Spacetime
        Type: general
      – SubjectFull: Frequency-domain analysis
        Type: general
      – SubjectFull: Time-domain analysis
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      – SubjectFull: Electrodynamics
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      – TitleFull: Charged superradiant instability of spherically symmetric regular black holes in de Sitter spacetime: time- and frequency-domain analysis.
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            NameFull: Xu, Hengyu
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            – D: 01
              M: 05
              Text: May2026
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              Y: 2026
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