Origin of a classical space in guantum cosmologies

Details Origin of a classical space in guantum cosmologies Origin of a classical space in guantum cosmologies

2000-12-27

arxiv.org/abs/hep-th/0012245v2

Grav.Cosmol. 7 (2001) 211-214

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, Latex, no figures, minor corrections in the text and in some formulas, matches version published in Gravitation & Cos

Scientific paper

The influence of vector fields on the origin of a classical space in quantum cosmologies and on the possible compactification process in multidimensional gravity is investigated. It is shown that all general features of the transition between classical and quantum regimes of the evolution can be obtained within the simplest Bianchi-I model for arbitrary number of dimensions. It is shown that the classical space appears when the horizon size reaches the smallest of characteristic scales (the characteristic scale of inhomogeneity or a scale associated with vector fields). In multidimensional case the presence of vector fields completely removes the initial stage of the compactification process which takes place in the case of vacuum models.

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