Non-Abelian Born--Infeld cosmology

Details Non-Abelian Born--Infeld cosmology Non-Abelian Born--Infeld cosmology

2001-11-12

arxiv.org/abs/hep-th/0111099v1

Phys.Rev. D65 (2002) 084007

Physics

High Energy Physics

High Energy Physics - Theory

Latex2e, 7 figures

Scientific paper

10.1103/PhysRevD.65.084007

We investigate homogeneous and isotropic cosmological solutions supported by the SU(2) gauge field governed by the Born-Infeld lagrangian. In the framework of the Friedmann-Robertson-Walker cosmology, with or without cosmological constant $\lambda$, we derive dynamical systems that give rather complete description of the space of solutions. For $\lambda=0$ the effective equation of state $\ve(p)$ is shown to interpolate between $p=-\ve/3$ in the regime of the strong field and $p=\ve/3$ for the weak field. Correspondingly, the Universe starts with zero acceleration and gradually enters the decelerating regime, asymptotically approaching the Tolman solution.

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