Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2010-12-26
Phys.Rev.D84:024005,2011
Physics
High Energy Physics
High Energy Physics - Theory
JHEP style, 14 pages, 2 figures
Scientific paper
10.1103/PhysRevD.84.024005
We consider a cosmological model based upon a non-canonical noncommutative extension of the Heisenberg-Weyl algebra to address the thermodynamical stability and the singularity problem of both the Schwarzschild and the Kantowski-Sachs black holes. The interior of the black hole is modelled by a noncommutative extension of the Wheeler-DeWitt equation. We compute the temperature and entropy of a Kantowski-Sachs black hole and compare our results with the Hawking values. Again, the noncommutativity in the momenta sector allows us to have a minimum in the potential, which is relevant in order to apply the Feynman-Hibbs procedure. For Kantowski-Sachs black holes, the same model is shown to generate a non-unitary dynamics, predicting vanishing total probability in the neighborhood of the singularity. This result effectively regularizes the Kantowski-Sachs singularity and generalizes a similar result, previously obtained for the case of Schwarzschild black hole.
Bastos Catarina
Bertolami Orfeu
Dias Nuno Costa
Prata Joao Nuno
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