A radiation-like era before inflation

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We show that the semiclassical approximation to the Wheeler-DeWitt equation for the minisuperspace of a minimally coupled scalar field in the spatially flat de Sitter Universe prompts the existence of an initial power-law evolution driven by non-adiabatic terms from the gravitational wavefunction which act like radiation. This simple model hence describes the onset of inflation from a previous radiation-like expansion during which the cosmological constant is already present but subleading.
LaTeX, 8 pages, no figures; final version to be published in JCAP

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General Relativity and Quantum Cosmology, High Energy Physics - Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/214296

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0808.0092
 http://arxiv.org/abs/0808.0092
 JCAP 0810:027,2008
 doi:10.1088/1475-7516/2008/10/027

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arXiv