Dust collapse in asymptotic safety: a path to regular black holes

Abstract

Regular black hole spacetimes are obtained from an effective Lagrangian for Quantum Einstein Gravity. The interior matter is modeled as a dust fluid, which interacts with the geometry through a multiplicative coupling function denoted as $\chi$. The specific functional form of $\chi$ is deduced from Asymptotically Safe gravity, under the key assumption that the Reuter fixed point remains minimally affected by the presence of matter. As a consequence the gravitational coupling vanishes at high energies. The static exterior geometry of the black hole is entirely determined by the junction conditions at the boundary surface. Consequently, the resulting global spacetime geometry remains devoid of singularities at all times. This outcome offers a new perspective on how regular black holes are formed through gravitational collapse.

6 pages, 4 figures

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• Singularity resolution and inflation from an infinite tower of regularized curvature corrections
• Quasinormal Modes and Gray-Body Factors for Gravitational Perturbations in Asymptotically Safe Gravity
• Primordial black holes as cosmic expansion accelerators
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• Covariant dynamics from static spherically symmetric geometries
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• Conundrum of regular black holes with nonlinear electromagnetic fields
• On Schwarzschild black hole singularity formation
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• Constraints on the Scale Parameter of Regular Black Hole in Asymptotically Safe Gravity from Extreme Mass Ratio Inspirals
• Quantum dust collapse with cosmological constant and methods for constructing conformal diagrams
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• Cosmic inflation prevents singularity formation in collapse into a Hayward black hole
• Primordial black hole driven cosmic acceleration
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• Formation of gravastars
• Quasinormal modes of regular black holes surrounded by skewed dark matter distributions
• Charting GLOBs in Asymptotically Safe Gravity
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