20 citations · 41 across the 20 of their papers we have counts for
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Reflectionless and echo modes in asymmetric Damour-Solodukhin wormholes
Wei-Liang Qian, Qiyuan Pan, Ramin G. Daghigh +2
It is understood that the echo waveforms in ultracompact objects can be regarded as composed mainly of the asymptotic high-overtone quasinormal modes, dubbed echo modes, which pred…
A Critical Point on the Hairy Black Hole Phase Boundary in the Improved Holographic Einstein-Maxwell-Dilaton Theory
Hong Guo, Wei-Liang Qian, Bean Wang
In this work, we investigate the hairy black hole solutions and their dual phase diagram in the improved holographic Einstein-Maxwell-Dilaton (EMD) model.From the gravitational per…
Spectral instability in modified Pöschl-Teller effective potential triggered by deterministic and random perturbations
Shui-Fa Shen, Guan-Ru Li, Ramin G. Daghigh +4
Owing to its substantial implications for black hole spectroscopy, spectral instability has attracted considerable attention in the literature. While the emergence of such instabil…
On Hyperboloidal Foliations in the Study of Black Hole Quasinormal Modes
Shui-Fa Shen, Guan-Ru Li, Xiao-Mei Kuang +5
In this work, we demonstrate that the hyperboloidal foliation technique, applied to the study of black hole quasinormal modes, where the spatial boundary is shifted from spacelike…
Asymptotic quasinormal modes, echoes, and black hole spectral instability: a brief review
Shui-Fa Shen, Guan-Ru Li, Ramin G. Daghigh +4
We present a short review of the analytical aspects of recent progress in the study of black hole spectral instability and its potential observational consequences. This topic, ins…
Novel black holes with scalar hair in the Einstein-Maxwell-Scalar Theory with positive coupling
Hong Guo, Wei-Liang Qian, Bean Wang
In this work, we find a new branch of hairy black hole solutions in the Einstein-Maxwell-Scalar (EMS) theory in four-dimensional asymptotically flat spacetimes. Different from spon…
Regge poles, grey body factors, and absorption cross sections for black hole metrics with discontinuity
Guan-Ru Li, Wei-Liang Qian, Qiyuan Pan +3
It was recently proposed by Rosato {\it et al.} and Oshita {\it et al.} that black hole greybody factors, as stable observables at relatively high frequencies, are more relevant qu…
Evolution of black hole echo modes and the causality dilemma
Ramin G. Daghigh, Guan-Ru Li, Wei-Liang Qian +1
It has been shown that black hole quasinormal modes are subject to spectral instability, typically triggered by metric perturbations. These perturbations, which can introduce a min…