Power spectrum of large-scale magnetic fields from Gravitoelectromagnetic inflation with a decaying cosmological parameter

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Introducing a variable cosmological parameter $Λ(t)$ in a geometrical manner from a 5D Riemann-flat metric, we investigate the origin and evolution of primordial magnetic fields in the early universe, when the expansion is governed by a cosmological parameter $Λ(t)$ that decreases with time. Using the gravitoelectromagnetic inflationary formalism, but without the Feynman gauge, we obtain the power of spectrums for large-scale magnetic fields and the inflaton field fluctuations during inflation. A very important fact is that our formalism is {\em naturally non-conformally invariant}.
7 pages, no figures

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High Energy Physics - Theory

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http://salesiana.dossiersoluciones.com/handle/123456789/144505

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0712.3032
 http://arxiv.org/abs/0712.3032

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arXiv