Anisotropic cosmological models with non-minimally coupled magnetic field

Details Anisotropic cosmological models with non-minimally coupled magnetic field Anisotropic cosmological models with non-minimally coupled magnetic field

2005-04-10

arxiv.org/abs/astro-ph/0504228v1

Phys.Rev. D71 (2005) 124014

Astronomy and Astrophysics

Astrophysics

22 pages, to appear in PRD

Scientific paper

10.1103/PhysRevD.71.124014

Motivated by the structure of one-loop vacuum polarization effects in curved spacetime we discuss a non-minimal extension of the Einstein-Maxwell equations. This formalism is applied to Bianchi I models with magnetic field. We obtain several exact solutions of the non-minimal system including those which describe an isotropization process. We show that there are inflationary solutions in which the cosmological constant is determined by the non-minimal coupling parameters. Furthermore, we find an isotropic de Sitter solution characterized by a "screening" of the magnetic field as a consequence of the non-minimal coupling.

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