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arXiv · 2609.29243

Asymptotic expansion of cavity Quasi-Normal Modes in Schwarzschild de-Sitter black hole

Arnab Priya Saha·Prajwal Shivanna
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Abstract

We study large-overtone quasi-normal modes of a massive scalar field in a four-dimensional Schwarzschild de-Sitter black hole in the presence of a wall placed at the static sphere. Dirichlet boundary condition is imposed at the wall. At leading order the quasi-normal modes with large overtones scale as $n$ for $n\gg 1$ and are inversely proportional to the bouncing time. We analyze correction terms up to $n^{-1}$ order in the asymptotic expansion.

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Arnab Priya Saha, Prajwal Shivanna. 2026-09-24. Asymptotic expansion of cavity Quasi-Normal Modes in Schwarzschild de-Sitter black hole. https://arxiv.org/abs/2609.29243

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