Can a false vacuum bubble remove the singularity inside a black hole?

We propose a construction with which to resolve the black hole singularity and enable an anisotropic cosmology to emerge from the inside of the hole. The model relies on the addition of an S-brane to the effective action which describes the geometry of space-time. This space-like defect is located inside of the horizon on a surface where the Weyl curvature reaches a limiting value. We study how metric fluctuations evolve from the outside of the black hole to the beginning of the cosmological phase to the future of the S-brane. Our setup addresses i) the black hole singularity problem, ii) the cosmological singularity problem and iii) the information loss paradox since the outgoing Hawking radiation is entangled with the state inside the black hole which becomes the new universe.

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“…The transition from a black hole to a white hole has recently been extensively discussed (see e.g. [65][66][67][68] and [69,70]).…”

Section: Jhep05(2021)090mentioning

confidence: 99%

Non-singular black holes with a zero-shear S-brane

Brandenberger

Heisenberg

Robnik

2021

J. High Energ. Phys.

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“…One typical problem is that such type of strange matter is distributed in a space-like direction. This implies that if this strange matter were to be modelled by some dynamical field variables, they would have to necessarily turn tachyonic, immediately making it unphysical [11]. Also, in some cases where there are two horizons, the solutions can still suffer from a mass inflation singularity inherent to dynamical models [12].…”

Section: Jcap11(2020)002mentioning

confidence: 99%

Annihilation-to-nothing: a quantum gravitational boundary condition for the Schwarzschild black hole

Bouhmadi-López

Brahma

Chen

et al. 2020

J. Cosmol. Astropart. Phys.

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The interior of a static Schwarzschild metric can be written in terms of two functions, similar to some models of anisotropic cosmology. With a suitable choice of canonical variables, we solve the Wheeler-DeWitt equation (WDW) inside the horizon of a Schwarzschild black hole. By imposing classicality near the horizon, and requiring boundedness of the wave function, we get a rather generic solution of the WDW equation, whose steepest-descent solution, i.e., the ridge of the wave function, coincides nicely with the classical trajectory. However, there is an ambiguity in defining the arrow of time which leads to two possible interpretations—(i) if there is only one arrow of time, one can infer that the steepest-descent of the wave function follows the classical trajectory throughout: coming from the event horizon and going all the way down to the singularity, while (ii) if there are two different arrows of time in two separate regimes, it can be inferred that the steepest-descent of the wave function comes inwards from the event horizon in one region while it moves outwards from the singularity in the other region, and there exists an annihilation process of these two parts of the wave function inside the horizon. Adopting the second interpretation could shed light on the information loss paradox: as time goes on, probabilities for histories that include black holes and singularities decay to zero and eventually only trivial geometries dominate.

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“…2 Some mechanism is also needed to prevent a black hole universe from collapsing into a singularity. While various mechanisms have been suggested for achieving this in ordinary black holes [12][13][14][15][16][17][18][19][20][21][22][23][24], none of these seem immediately applicable to a black hole universe. Dark energy has been linked to possible expansion of black holes [25] and might similarly prevent cosmic collapse.…”

Section: Introductionmentioning

confidence: 99%

In an Eggshell: Baryonic Black Hole Universe with CMB Cycle for Gravity and Λ

Edwards

2024

Preprint

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A persistent idea in cosmology is that the universe originated and then continued to evolve as a black hole. While the notion of a black hole universe has generally been framed within the standard cosmological model, the latter has had numerous problems related to dark matter, dark energy and other issues. To avoid such problems an alternative is proposed which omits cosmic expansion, dark matter and dark energy. The observable universe is cast instead as primarily a thin spherical shell of cold (~29 K) baryonic matter situated near the Hubble radius. This shell of plasma holds 95% of the observable universe’s mass, the remaining 5% existing in the interior galaxies and gas clouds. A key premise of the model is that spacetime is fundamentally photonic in nature. This allows photon energy to be transferred to spacetime in the Hubble redshift and to be transferred back to photons in a novel blueshift. These exchanges together drive a cosmic energy cycle for gravity and the cosmological constant, Λ. Photons of the cosmic microwave background originating in the plasma shell lose energy to ‘cooler’ regions of spacetime in interior zones via the Hubble redshift. This gives rise to gravity through the optical gravity approach. The depleted photons moving back towards the shell are then reenergized in ‘hotter’ spacetime regions via the Hubble blueshift. These photons eventually exert outward pressures on the shell which perfectly balance the inward forces of gravity, in this manner functioning as Einstein’s cosmological constant. The observable universe behaves as a closed system in thermodynamic equilibrium with constant energy and entropy and indeterminate age. Black holes are suggested to have analogous plasma shell structures and gravity/Λ cycles.

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Can a false vacuum bubble remove the singularity inside a black hole?

Cited by 10 publications

References 35 publications

Non-singular black holes with a zero-shear S-brane

Non-singular black holes with a zero-shear S-brane

Annihilation-to-nothing: a quantum gravitational boundary condition for the Schwarzschild black hole

In an Eggshell: Baryonic Black Hole Universe with CMB Cycle for Gravity and Λ

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