Dust Collapse in Asymptotic Safety: A Path to Regular Black Holes
Bonanno A. Malafarina D. Panassiti A.
19 January 2024American Physical Society
Physical Review Letters
2024#132Issue 3
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 χ. The specific functional form of χ 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.
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Inaf, Osservatorio Astrofisico di Catania, via S.Sofia 78, Catania, I-95123, Italy
Department of Physics, Nazarbayev University, Kabanbay Batyr 53, Astana, 010000, Kazakhstan
Dipartimento di Fisica e Astronomia Ettore Majorana, Università di Catania, Via S. Sofia 64, Catania, 95123, Italy
Infn, Sezione di Catania, via S.Sofia 64, Catania, I-95123, Italy
Inaf
Department of Physics
Dipartimento di Fisica e Astronomia Ettore Majorana
Infn
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