Mathematics – Logic
Scientific paper
Aug 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010gregr..42.1875e&link_type=abstract
General Relativity and Gravitation, Volume 42, Issue 8, pp.1875-1887
Mathematics
Logic
5
Brans–Dicke Cosmology, Anisotropic Spacetime, Nonlinear Derivative Interaction, Gauss–Bonnet, Accelerated Expansion, Two Interacting Scalar Fields, Kasner-Like Solution, Freezing Potential
Scientific paper
The study of Brans-Dicke cosmology has attracted considerable attention in the recent years since it explains most of the important features of the progress of the universe. We discuss in this letter a homogeneous and anisotropic cosmological model in the framework of Brans-Dicke theory including together a non-linear derivative interaction which appears in theory with the Galilean shift symmetry, a Gauss-Bonnet invariant motivated from heterotic string theory which plays an important role in numerous alternatives cosmological frameworks, two scalar fields and their interactions to fit easier with universe history expansion. Several particular cases are studied and the properties related to scaling solutions and asymptotic behaviour are discussed in some details.
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