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Magneto-dilatonic Bianchi-I cosmology: isotropization and singularity problems

2004
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Classical and quantum gravity
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We study the evolution of Bianchi-I space-times filled with a global unidirectional electromagnetic field $F_{mn}$ interacting with a massless scalar dilatonic field according to the law \Psi(\phi) F^{mn} F_{mn} where \Psi(\phi) > 0 is an arbitrary function. A qualitative study, among other results, shows that (i) the volume factor always evolves monotonically, (ii) there exist models becoming isotropic at late times and (iii) the expansion generically starts from a singularity but there can be

doi:10.1088/0264-9381/21/14/005
fatcat:l2ecuule2rf5bferr5bnxvp3ba