Modelling the evaporation of nonsingular black holes

Taves, Tim; Kunstatter, G.

doi:10.1103/physrevd.90.124062

Cited by 11 publications

(14 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Let us mention that an independent interesting approach to the self-consistency problem are attempts to construct a regular black hole model in the framework of a 2D dilaton gravity, that include both quantum radiation and its back-reaction (see e.g. [59][60][61][62]. Anyway, search for (quantum) consistent nonsingular models of black holes is an interesting open problem which waits for its solution.…”

Section: Discussionmentioning

confidence: 99%

Quantum radiation from a sandwich black hole

Frolov

Zelnikov

2017

Phys. Rev. D

View full text Add to dashboard Cite

We discuss quantum radiation of a massless scalar field from a spherically symmetric nonsingular black hole with finite lifetime. Namely, we discuss a sandwich black-hole model, where a black hole is originally created by a collapse of a null shell of mass M , and later, after some time ∆V , it is disrupted by the collapse of the other shell with negative mass −M . We assume that between the shells the metric is static and either coincides with the Hayward metric or with a special generalization of it. We show that in both cases for sufficiently large parameter ∆V the radiation after the formation of the black hole practically coincides with the Hawking result. We also calculated the radiation, emitted from the black hole interior. This radiation contains peak at the moment when the second shell intersects the inner horizon. In the standard sandwich metric (with the Hayward interior) this outburst of the energy is exponentially large. In the modified metric, which includes additional non-trivial redshift parameter, this exponent is suppressed. This is a result of significant decrease of the surface gravity of the inner horizon in the latter case. We discuss possible consequences of this result in context of the self-consistency requirement for nonsingular models with quantum radiation.

show abstract

Section: Discussionmentioning

confidence: 99%

Quantum radiation from a sandwich black hole

Frolov

Zelnikov

2017

Phys. Rev. D

View full text Add to dashboard Cite

show abstract

“…The Hamiltonian analysis of spherically symmetric ELL gravity was discussed in [41,42]. The following is based in large part on the methodology and results of [31,32] and uses the notation and conventions of [18].…”

Section: Hamiltonian Formalismmentioning

confidence: 99%

“…By making suitable choices of the functions of R in the action, the solutions can describe nonsingular spacetimes that have either two horizons or, at least in one special case, one horizon. If one chooses, for example, h(R) = V (R) = φ ,RR (R), the most general solution is [18]…”

Section: Criterion For Physical Nonsingular Black Holesmentioning

confidence: 99%

New 2D dilaton gravity for nonsingular black holes

Kunstatter

Maeda

Taves

2016

Class. Quantum Grav.

Self Cite

View full text Add to dashboard Cite

We construct a two-dimensional action that is an extension of spherically symmetric Einstein-Lanczos-Lovelock gravity. The action contains arbitrary functions of the areal radius and the norm squared of its gradient, but the field equations are second order and obey Birkhoff's theorem. In complete analogy with spherically symmetric Einstein-Lanczos-Lovelock gravity, the field equations admit the generalized Misner-Sharp mass as the first integral that determines the form of the vacuum solution. The arbitrary functions in the action allow for vacuum solutions that describe a larger class of interesting nonsingular black-hole spacetimes than previously available.

show abstract

“…It is shown that other singularities such as big bang singularity [5] are modified considerably when quantum gravitational effects are considered. Similar considerations were applied to Black holes in several articles arguing that the collapse shall stop before the singularity is formed [3,[6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. They either rely on arguments based on quantum gravity or Hawking radiation.…”

Section: Introductionmentioning

confidence: 99%

Obstruction of black hole singularity by quantum field theory effects

Abedi

Arfaei

2016

J. High Energ. Phys.

View full text Add to dashboard Cite

Abstract:We consider the back reaction of the energy due to quantum fluctuation of the background fields considering the trace anomaly for Schwarzschild black hole. It is shown that it will result in modification of the horizon and also formation of an inner horizon. We show that the process of collapse of a thin shell stops before formation of the singularity at a radius slightly smaller than the inner horizon at the order of (c A M Mp ) 1/3 l p . After the collapse stops the reverse process takes place. Thus we demonstrate that without turning on quantum gravity and just through the effects the coupling of field to gravity as trace anomaly of quantum fluctuations the formation of the singularity through collapse is obstructed. An important consequence of our work is existence of an extremal solution with zero temperature and a mass which is lower bound for the Schwazschild solution. This solution is also the asymptotic final stable state after Hawking radiation.

show abstract

Modelling the evaporation of nonsingular black holes

Cited by 11 publications

References 41 publications

Quantum radiation from a sandwich black hole

Quantum radiation from a sandwich black hole

New 2D dilaton gravity for nonsingular black holes

Obstruction of black hole singularity by quantum field theory effects

Contact Info

Product

Resources

About