Black Hole Mass Threshold from Nonsingular Quantum Gravitational Collapse
Martin BojowaldMax-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, D-14476 Potsdam, GermanyRituparno GoswamiTata Institute for Fundamental Research, Colaba, Mumbai, IndiaRoy MaartensInstitute of Cosmology and Gravitation, University of Portsmouth, Portsmouth PO1 2EG, United KingdomParampreet SinghInstitute for Gravitational Physics and Geometry, Pennsylvania State University, University Park, Pennsylvania 16802, USA
2005en
ABI
Abstract
Quantum gravity is expected to remove the classical singularity that arises as the end state of gravitational collapse. To investigate this, we work with a toy model of a collapsing homogeneous scalar field. We show that nonperturbative semiclassical effects of loop quantum gravity cause a bounce and remove the black hole singularity. Furthermore, we find a critical threshold scale below which no horizon forms: quantum gravity may exclude very small astrophysical black holes.
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