8 papers
The entropy of black hole under second-order deviation from equilibrium
Wen-Tao Fu, Ming-Fei Ji, Yu-Sen Zhou +1
We investigate the entropy of a dynamical black hole arising from second-order perturbations of a general stationary background with a bifurcate Killing horizon. Using Gaussian nul…
Virtual absorption modes of Schwarzschild-de Sitter spacetimes in semi-open systems
Liang-Bi Wu, Yu-Sen Zhou, Zhe Yu +2
We present a study of virtual absorption modes (VAMs) in Schwarzschild-de Sitter (SdS) spacetime under semi-open boundary conditions, where the VAMs correspond to total transmissio…
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…
Imaging Signatures of the Israel Junction: Photon Ring Evolution in Dynamical Thin Shell Schwarzschild Spacetimes
Li-Ming Cao, Long-Yue Li, Xia-Yuan Liu
We study the images of black holes by gluing two Schwarzschild spacetimes with a thin shell where the Israel junction conditions are satisfied. By studying the refraction law for n…
Pseudospectrum and time-domain analysis of the EFT corrected black holes
Li-Ming Cao, Ming-Fei Ji, Liang-Bi Wu +1
We study the linear perturbations of a spherically symmetric black hole corrected by dimension-6 terms in the effective field theory (EFT) of gravity. The solution is asymptoticall…
The pseudospectrum for the Kerr black hole with spin case
Rong-Gen Cai, Li-Ming Cao, Jia-Ning Chen +3
We investigate the pseudospectrum of the Kerr black hole, which indicates the instability of the spectrum of quasinormal modes (QNMs) of the Kerr black hole. Methodologically, we u…