Non-Abelian Einstein-Born-Infeld-Dilaton Cosmology
Abstract
The non-abelian Einstein-Born-Infeld-Dilaton theory, which rules the dynamics of tensor-scalar gravitation coupled to a -valued gauge field ruled by Born-Infeld lagrangian, is studied in a cosmological framework. The microscopic energy exchange between the gauge field and the dilaton which results from a non-universality of the coupling to gravity modifies the usual behaviour of tensor-scalar theories coupled to matter fluids. General cosmological evolutions are derived for different couplings to gravitation and a comparison to universal coupling is highlighted. Evidences of cosmic acceleration are presented when the evolution is interpreted in the Jordan physical frame of a matter respecting the weak equivalence principle. The importance for the mechanism of cosmic acceleration of the dynamics of the Born-Infeld gauge field, the attraction role of the matter fluid and the non-universality of the gravitational couplings is briefly outlined.
Cite
@article{arxiv.gr-qc/0511090,
title = {Non-Abelian Einstein-Born-Infeld-Dilaton Cosmology},
author = {A. Fuzfa and J. -M. Alimi},
journal= {arXiv preprint arXiv:gr-qc/0511090},
year = {2011}
}
Comments
31 pages, 9 figures, minor changes, accepted for publication in Phys. Rev. D15