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gr-qc2024★ 1 cited
On the universality of instability in the fundamental quasinormal modes of black holes
Wei-Liang Qian, Guan-Ru Li, Ramin G. Daghigh +2
We elaborate on a criterion for the emergence of instability in the fundamental mode recently observed by Cheung {\it et al.}, as a universal phenomenon in the context of black hol…
gr-qc2024
On bifurcation and spectral instability of asymptotic quasinormal modes in the modified Pöschl-Teller effective potential
Guan-Ru Li, Wei-Liang Qian, Ramin G. Daghigh
The Pöchl-Teller effective potential mimics an asymptotically de Sitter black hole bounded by an event horizon and a cosmological one. Owing to the benefit of being analytically so…