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APS » Journals » Phys. Rev. Lett. » Volume 95 » Issue 9
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Phys. Rev. Lett. 95, 091302 (2005) [4 pages]

Black Hole Mass Threshold from Nonsingular Quantum Gravitational Collapse

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Martin Bojowald1, Rituparno Goswami2, Roy Maartens3, and Parampreet Singh4
1Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, D-14476 Potsdam, Germany
2Tata Institute for Fundamental Research, Colaba, Mumbai, India
3Institute of Cosmology and Gravitation, University of Portsmouth, Portsmouth PO1 2EG, United Kingdom
4Institute for Gravitational Physics and Geometry, Pennsylvania State University, University Park, Pennsylvania 16802, USA

Received 10 March 2005; published 24 August 2005

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

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.95.091302
DOI:
10.1103/PhysRevLett.95.091302
PACS:
04.60.Pp, 04.70.Dy
 
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