We studied the instability of regularized 4D charged Einstein-Gauss-Bonnet de-Sitter black holes under charged scalar perturbations. The unstable modes satisfy the superradiant condition, but not all of the modes satisfying the superradiant condition are unstable. The instability occurs when the cosmological constant is small and the black hole charge is not too large. The Gauss-Bonnet coupling constant further destabilizes black holes when both the black hole charge and the cosmological constant are small and further stabilizes black holes when the black hole charge is large.

中文翻译：

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国家自然科学基金资助的正则化 4D 带电 Einstein-Gauss-Bonnet de-Sitter 黑洞的不稳定性 (11847055, 11905083, 11805083, 11947067)

我们研究了带电标量扰动下正则化 4D 带电 Einstein-Gauss-Bonnet de-Sitter 黑洞的不稳定性。不稳定模式满足超辐射条件，但并非所有满足超辐射条件的模式都是不稳定的。当宇宙学常数较小且黑洞电荷不太大时，就会发生不稳定性。当黑洞电荷和宇宙常数都很小时，高斯-博内耦合常数进一步使黑洞不稳定，当黑洞电荷很大时，进一步稳定黑洞。