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. © 2005 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Bojowald, M., Goswami, R., Maartens, R., & Singh, P. (2005). Black hole mass threshold from nonsingular quantum gravitational collapse. Physical Review Letters, 95 (9) https://doi.org/10.1103/PhysRevLett.95.091302