Toward a Midisuperspace Quantization of LeMaitre-Tolman-Bondi Collapse Models

Details Toward a Midisuperspace Quantization of LeMaitre-Tolman-Bondi Collapse Models Toward a Midisuperspace Quantization of LeMaitre-Tolman-Bondi Collapse Models

2000-12-15

arxiv.org/abs/gr-qc/0012053v2

Phys.Rev. D63 (2001) 104020

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

9 pages, 1 figure, Latex file. Minor corrections made. A general solution of the constraints is presented. Revised version to

Scientific paper

10.1103/PhysRevD.63.104020

LeMa\^\i tre-Tolman-Bondi models of spherical dust collapse have been used and continue to be used extensively to study various stellar collapse scenarios. It is by now well-known that these models lead to the formation of black holes and naked singularities from regular initial data. The final outcome of the collapse, particularly in the event of naked singularity formation, depends very heavily on quantum effects during the final stages. These quantum effects cannot generally be treated semi-classically as quantum fluctuations of the gravitational field are expected to dominate before the final state is reached. We present a canonical reduction of LeMa\^\i tre-Tolman-Bondi space-times describing the marginally bound collapse of inhomogeneous dust, in which the physical radius, $R$, the proper time of the collapsing dust, $\tau$, and the mass function, $F$, are the canonical coordinates, $R(r)$, $\tau(r)$ and $F(r)$ on the phase space. Dirac's constraint quantization leads to a simple functional (Wheeler-DeWitt) equation. The equation is solved and the solution can be employed to study some of the effects of quantum gravity during gravitational collapse with different initial conditions.

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