6 papers
Quasinormal modes of Schwarzschild--AdS black holes with a near-horizon reflective surface
Libo Xie, Liang-Bi Wu, Yu-Sen Zhou +3
We investigate the scalar quasinormal mode (QNM) spectrum of Schwarzschild-AdS black holes with a partially reflective surface placed near the event horizon. The corresponding QNM…
Quasinormal modes of Schwarzschild-de Sitter black holes in semi-open systems
Liang-Bi Wu, Libo Xie, Li-Ming Cao +2
We study perturbations of Schwarzschild-de Sitter black holes in semi-open systems by using the Heun functions. For the semi-open system, a partially reflective wall is added aroun…
Waveform stability for the piecewise step approximation of Regge-Wheeler potential
Liang-Bi Wu, Libo Xie, Yu-Sen Zhou +2
By interpreting the difference between the original Regge-Wheeler potential and its piecewise step approximation as perturbative effects induced by the external environment of the…
Spectrum instability and greybody factor stability for parabolic approximation of Regge-Wheeler potential
Libo Xie, Liang-Bi Wu, Zong-Kuan Guo
We investigate the stability of QNM spectra and greybody factors in the Schwarzschild black hole by approximating the Regge-Wheeler potential with a piecewise parabolic form and tr…
The stability of the greybody factor of Hayward black hole
Liang-Bi Wu, Rong-Gen Cai, Libo Xie
In this study, we investigate the stability of the greybody factor of Hayward black holes by adding a small bump to the effective potential. Since the greybody factor depends on fr…
The pseudospectrum and spectrum (in)stability of quantum corrected Schwarzschild black hole
Li-Ming Cao, Jia-Ning Chen, Liang-Bi Wu +2
In this study, we investigate the pseudospectrum and spectrum (in)stability of quantum corrected Schwarzschild black hole. Methodologically, we use the hyperboloidal framework to c…