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Type: Artigo de periódico
Title: n-dimensional FLRW quantum cosmology
Author: Letelier, PS
Pitelli, JPM
Abstract: We introduce the formalism of quantum cosmology in a Friedmann-Lemaitre-Robertson-Walker (FLRW) universe of arbitrary dimension filled with a perfect fluid with p = alpha rho equation of state. First we show that the Schutz formalism, developed in four dimensions, can be extended to a n-dimensional universe. We compute the quantum representant of the scale factor a(t), in the Many-Worlds, as well as, in the de Broglie-Bohm interpretation of quantum mechanics. We show that the singularities, which are still present in the n-dimensional generalization of FLRW universe, are excluded with the introduction of quantum theory. We quantize, via the de Broglie-Bohm interpretation of quantum mechanics, the components of the Riemann curvature tensor in a tetrad basis in a n-dimensional FLRW universe filled with radiation (p = 1/n-1 rho). We show that the quantized version of the Ricci scalar are perfectly regular for all time t. We also study the behavior of the energy density and pressure and show that the ratio < p > L/<rho > L tends to the classical value 1/(n - 1) only for n = 4, showing that n = 4 is somewhat privileged among the other dimensions. Besides that, as n -> infinity, < p > L/<rho > L -> 1.
Country: EUA
Editor: Amer Physical Soc
Citation: Physical Review D. Amer Physical Soc, v. 82, n. 10, 2010.
Rights: aberto
Identifier DOI: 10.1103/PhysRevD.82.104046
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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