In this study,we investigate the pseudospectrum and spectrum(in)stability of quantum corrected Schwarzschild black hole.Methodologically,we use the hyperboloidal framework to cast the quasinormal mode(QNM)problem into...In this study,we investigate the pseudospectrum and spectrum(in)stability of quantum corrected Schwarzschild black hole.Methodologically,we use the hyperboloidal framework to cast the quasinormal mode(QNM)problem into an eigenvalue problem associated with a non-selfadjoint operator,and then the spectrum and pseudospectrum are depicted.Besides,the invariant subspace method is exploited to improve the computational efficiency for pseudospectrum.The investigation into the spectrum(in)stability entails two main aspects.On the one hand,we calculate the spectra of the quantum corrected black hole,then by the means of the migration ratio,the impact of the quantum correction effect on the Schwarzschild black hole has been studied.The results indicate that the so-called“migration ratio instability”will occur for small black holes with small angular momentum number l.In the eikonal limit,the migration ratios remain the same for each overtone.On the other hand,we study the spectrum(in)stability of the quantum corrected black hole by directly adding some particular perturbations into the effective potential,where perturbations are located at the event horizon and null infinity,respectively.There are two interesting observations under the same perturbation energy norm.First,perturbations at infinity are more capable of generating spectrum instability than those at the event horizon.Second,we find that the peak distribution can lead to the instability of QNM spectrum more efficiently than the average distribution.展开更多
The aim of this paper is to clarify the role played by resolvent estimates for nonlinear stability.We will give examples showing that a large resolvent may lead to a small domain of nonlinear stability.In other exampl...The aim of this paper is to clarify the role played by resolvent estimates for nonlinear stability.We will give examples showing that a large resolvent may lead to a small domain of nonlinear stability.In other examples the resolvent is large,but the domain of nonlinear stability is completely unrestricted.Which case prevails depends on the details of the problem. We will also show that the size of the resolvent depends in an essential way on the norms that are used.展开更多
基金supported in part by the National Key R&D Program of China(Grant No.2022YFC2204603)supported by the National Natural Science Foundation of China(Grant Nos.12075232,and 12247103)。
文摘In this study,we investigate the pseudospectrum and spectrum(in)stability of quantum corrected Schwarzschild black hole.Methodologically,we use the hyperboloidal framework to cast the quasinormal mode(QNM)problem into an eigenvalue problem associated with a non-selfadjoint operator,and then the spectrum and pseudospectrum are depicted.Besides,the invariant subspace method is exploited to improve the computational efficiency for pseudospectrum.The investigation into the spectrum(in)stability entails two main aspects.On the one hand,we calculate the spectra of the quantum corrected black hole,then by the means of the migration ratio,the impact of the quantum correction effect on the Schwarzschild black hole has been studied.The results indicate that the so-called“migration ratio instability”will occur for small black holes with small angular momentum number l.In the eikonal limit,the migration ratios remain the same for each overtone.On the other hand,we study the spectrum(in)stability of the quantum corrected black hole by directly adding some particular perturbations into the effective potential,where perturbations are located at the event horizon and null infinity,respectively.There are two interesting observations under the same perturbation energy norm.First,perturbations at infinity are more capable of generating spectrum instability than those at the event horizon.Second,we find that the peak distribution can lead to the instability of QNM spectrum more efficiently than the average distribution.
基金Supported by Office of Naval Research n00014 90 j 1382Supported by NSF Grant DMS-9404124 and DOE Grant DE-FG03-95ER25235
文摘The aim of this paper is to clarify the role played by resolvent estimates for nonlinear stability.We will give examples showing that a large resolvent may lead to a small domain of nonlinear stability.In other examples the resolvent is large,but the domain of nonlinear stability is completely unrestricted.Which case prevails depends on the details of the problem. We will also show that the size of the resolvent depends in an essential way on the norms that are used.
