Signature of Non-uniform Area Quantization on Black Hole Echoes

Chakravarti, Kabir; Ghosh, Rajes; Sarkar, Sudipta

doi:10.48550/arxiv.2112.10109

Cited by 5 publications

(6 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Contrary to the common lore that detections of echoes in late-time ringdown signals can be used to distinguish black holes with wormholes, echo signals have been reported in several black hole models, e.g., quantum black holes [38][39][40][41][42], black holes with discontinuous effective potentials [43], nonuniform area quantization on black hole [44] and gravitons with modified dispersion relations [45]. Remarkably, much less radical proposals for echoes from black holes do exist in the literature.…”

Section: Introductionmentioning

confidence: 91%

Echoes from hairy black holes

Guo

Wang

et al. 2022

J. High Energ. Phys.

View full text Add to dashboard Cite

We study the waveforms of time signals produced by scalar perturbations in static hairy black holes, in which the perturbations can be governed by a double-peak effective potential. The inner potential peak would give rise to echoes, which provide a powerful tool to test the Kerr hypothesis. The waveforms are constructed in the time and frequency domains, and we find that the late-time waveforms are determined by the long-lived and sub-long-lived quasinormal modes, which are trapped in the potential valley and near the smaller peak, respectively. When the distance between the peaks is significantly larger than the width of the peaks, a train of decaying echo pulses is produced by the superposition of the long-lived and sub-long-lived modes. In certain cases, the echoes can vanish and then reappear. When the peaks are close enough, one detects far fewer echo signals and a following sinusoid tail, which is controlled by the long-lived or sub-long-lived mode and hence decays very slowly.

show abstract

Section: Introductionmentioning

confidence: 91%

Echoes from hairy black holes

Guo

Wang

et al. 2022

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…While BHAQ has been around since the 1970's, the current discussion on GW echoes has lead to new and directly related studies [36,[38][39][40][41][42]. The main reason is that area quantization provides a phenomenological framework to perform semi-classical calculations of the form of the hypothetical GW echoes.…”

Section: Introductionmentioning

confidence: 99%

On black hole area quantization and echoes

Coates¹,

Völkel²,

Kokkotas³

2022

Class. Quantum Grav.

View full text Add to dashboard Cite

In this work we argue that black hole area quantization of Bekenstein and Mukhanov should not give rise to measurable effects in terms of so-called gravitational wave echoes during black hole mergers. We outline that the quantum spectrum of a black hole should be washed out during and after black hole mergers, and hence one should not expect echoes in this scenario. The extreme broadening of the spectrum is due to the large particle emission rate during ringdown. Our results question key assumptions being made in recent literature on this topic.

show abstract

“…The presence of echoes has also been associated with modified theories of gravity [72] and existence of higher dimensions [73,74]. Echoes in gravitational waves is also expected to bear signatures of quantum gravity via quantization of the black hole area [75,76], although, Coates et al [77] have argued differently. For a detailed review on echoes in gravitational wave, we refer the reader to the excellent review by Cardoso and Pani [78].…”

Section: Introductionmentioning

confidence: 99%

Naked singularity in 4D Einstein-Gauss-Bonnet novel gravity: Echoes and (in)-stability

Chowdhury,

Devi,

Chakrabarti

2022

Preprint

View full text Add to dashboard Cite

We study the stability of an asymptotically flat, static, spherically symmetric naked singularity spacetime in the novel four dimensional Einstein-Gauss-Bonnet (EGB) gravity. The four dimensional EGB black hole for large enough values of the coupling parameter leads to such a naked singularity. The stability and the response of the spacetime is studied against the perturbations by test scalar, electromagnetic and Dirac fields and the time evolution of these perturbations were observed numerically. Implementing a null Dirichlet boundary condition near the singularity, we observed that for l = 1 modes of scalar, electromagnetic perturbation and l = 0, 1 modes of Dirac perturbation the time-domain profile give rise to distinct echoes. However, as the coupling constant is increased, the echoes align and the QNM structure of the 4D-EGB naked singularity-spacetime becomes prominent. For higher values of the multipole number, the spacetime becomes unstable, thereby restricting the parameter space for the coupling parameter.

show abstract

Signature of Non-uniform Area Quantization on Black Hole Echoes

Cited by 5 publications

References 32 publications

Echoes from hairy black holes

Echoes from hairy black holes

On black hole area quantization and echoes

Naked singularity in 4D Einstein-Gauss-Bonnet novel gravity: Echoes and (in)-stability

Contact Info

Product

Resources

About