Abstract
We quantize spherically symmetric vacuum gravity without gauge fixing the diffeomorphism constraint. Through a rescaling, we make the algebra of Hamiltonian constraints Abelian, and therefore the constraint algebra is a true Lie algebra. This allows the completion of the Dirac quantization procedure using loop quantum gravity techniques. We can construct explicitly the exact solutions of the physical Hilbert space annihilated by all constraints. New observables living in the bulk appear at the quantum level (analogous to spin in quantum mechanics) that are not present at the classical level and are associated with the discrete nature of the spin network states of loop quantum gravity. The resulting quantum space-times resolve the singularity present in the classical theory inside black holes.
- Received 6 March 2013
DOI:https://doi.org/10.1103/PhysRevLett.110.211301
© 2013 American Physical Society
Synopsis
At the Heart of a Black Hole
Published 23 May 2013
A quantum gravity theory suggests that the cores of black holes may be a region of highly curved spacetime, rather than a singularity point with zero volume and infinite density.
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