Echoes of novel black-bounce spacetimes

Yang, Yi; Liu, Dong; Xu, Zhaoyi; Xing, Yujia; Wu, Shurui; Long, Zheng-Wen

doi:10.1103/physrevd.104.104021

Cited by 44 publications

(24 citation statements)

References 67 publications

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“…[37], they investigated the SV metric and suggested that the black hole/wormhole transition is characterized by the echoes. A similar conclusion is presented in the LRSSV metric [38].…”

Section: Introductionsupporting

confidence: 82%

“…Then Lobo et al constructed a novel black bounce spacetimes (LRSSV metric) [33]. The observational properties, such as the gravitational lensing [34][35][36] and perturbation echoes [37,38], of SV metric and the LRSSV metric are studied. Especially in Ref.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. [37,38], they list all the possible shapes of the effective potential in the SV metric and the LRSSV metric. We choose two common classical shapes of all the possible effective potentials, namely the single peak and the two peak forms, to compare the difference.…”

Section: Introductionmentioning

confidence: 99%

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Echoes from Asymmetric Wormholes and Black Bounce

Ou,

Lai,

Huang

2021

Preprint

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The time evolution of the field perturbations in the wormhole and black bounce backgrounds are investigated. We find that the asymmetry of spacetime results in the asymmetry of the effective potential of the perturbed equation. The quasinormal modes are strongly dependent on the shapes of the effective potentials. Specifically, the signals of echoes arise in some wormhole cases and reflect the asymmetric properties of wormholes. We examine the features of echoes within different circumstances. Besides, the negative values of effective potentials usually imply the instability of the system. By analyzing some specific metrics, we find that the negative regions of effective potentials are enclosed by the black hole horizons in these cases. But this statement could be broken in asymmetric cases.

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“…[37], they investigated the SV metric and suggested that the black hole/wormhole transition is characterized by the echoes. A similar conclusion is presented in the LRSSV metric [38].…”

Section: Introductionsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

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Echoes from Asymmetric Wormholes and Black Bounce

Ou,

Lai,

Huang

2021

Preprint

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“…The most obvious, again, black hole thermodynamic since now they represent solutions with a sensible action principle with a clear field content 8 . On the other hand, it is possible to study several astrophysically relevant aspects of these black holes, as for example black hole shadows [75,76], gravitational lensing [77,78], black hole mimickers [79,80], quasinormal modes and echoes [81][82][83][84], to mention a few examples. We expect to report along these lines in our upcoming contributions.…”

Section: Conclusion and Further Developmentsmentioning

confidence: 99%

(A)dS Taub-NUT and exact black bounces with scalar hair

Barrientos¹,

Cisterna²,

Mora³

et al. 2022

Preprint

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We present a new family of exact four-dimensional Taub-NUT spacetimes in Einstein-Λ theory supplemented with a conformally coupled scalar field exhibiting a power-counting superrenormalizable potential. Our configurations are constructed in the following manner: A solution of a conformally coupled theory with a conformal potential, henceforth the seed (gµν , φ), is transformed by the action of a specific change of frame in addition with a simultaneous shift of the seed scalar field. The conformal factor of the transformation and the shift are both affine functions of the original scalar φ. The new configuration, (ḡµν , φ), solves the field equations of a conformally coupled theory with the extended aforementioned super-renormalizable potential, this under the presence of an effective cosmological constant. The new spectrum of solutions is notoriously enhanced with respect to the original seed containing regular black holes, wormholes, and bouncing cosmologies. We highlight the existence of two types of exact black bounces given by de Sitter and anti-de Sitter geometries that transit across three different configurations each. The de Sitter geometries transit from a regular black hole with event and cosmological horizons to a bouncing cosmology that connects two de Sitter Universes with different values of the asymptotic cosmological constant. An intermediate phase, which might be represented by two different configurations, takes place. These configurations are given by a de Sitter wormhole or by a bouncing cosmology that connects two de Sitter Universes, both under the presence of a cosmological horizon. On the other hand, the anti-de Sitter geometries transit from a regular black hole with inner and event horizons to a wormhole that connects two asymptotic boundaries with different constant curvatures. The intermediate phase is given in this case by an anti-de Sitter regular black hole with a single event horizon. This regular black hole might appear in two different configurations. As a regular anti-de Sitter black hole inside of an anti-de Sitter wormhole or as an anti-de Sitter regular black hole with a cosmological bounce in its interior. All these geometries are shown to be smoothly connected by the mass parameter only. Other standard stationary black holes, bouncing cosmologies and wormholes are also identified.

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“…As an alternative method to WKB, Leaver used numerical methods to calculate the gravitational Q-N modes of stationary and rotating black holes [19,20]. A brief summary of further and recent methods that produce accurate results in the determination of Q-N modes can be found in [21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Quantum corrections to the quasinormal modes of the Schwarzschild black hole

Chen¹,

Hassanabadi²,

Lütfüoğlu³

et al. 2022

Preprint

Self Cite

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Based on the minimum measurable momentum concepts associated with the quantum gravity effects acting on the large-scale dynamics of the universe. We use the new extended uncertainty principle (EUP) to study the Hawking temperature and black hole evaporation. The results show the new EUP quantum correction may shorten the lifetime of the massive black hole. To verify the new EUP on the black hole stability, we further investigate the quasinormal frequencies in terms of the 3rd order WKB approximation. The corrected Schwarzschild black hole is still stable under the uncertainty parameter 𝛼 is considered to be a small value. Furthermore, we analyze the transmission and reflection coefficients and discuss the absorption cross section with graphical methods in detail. It shows that the uncertainty parameter 𝛼 has a non-negligible effect on the scattering amplitudes of the corrected black hole.

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Echoes of novel black-bounce spacetimes

Cited by 44 publications

References 67 publications

Echoes from Asymmetric Wormholes and Black Bounce

Echoes from Asymmetric Wormholes and Black Bounce

(A)dS Taub-NUT and exact black bounces with scalar hair

Quantum corrections to the quasinormal modes of the Schwarzschild black hole

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