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Cosmology with Eddington-inspired Gravity · Around

2012

Cosmology with Eddington-inspired Gravity

Scargill, James H. C., Banados, Maximo, Ferreira, Pedro G.

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We study the dynamics of homogeneous, isotropic universes which are governed by the Eddington-inspired alternative theory of gravity which has a single extra parameter, $\kappa$.

Previous results showing singularity-avoiding behaviour for $\kappa > 0$ are found to be upheld in the case of domination by a perfect fluid with equation of state parameter $w > 0$.
The range $-1/3 < w < 0$ is found to lead to universes which experience unbounded expansion rate whilst still at a finite density.
In the case $\kappa < 0$ the addition of spatial curvature is shown to lead to the possibility of oscillation between two finite densities.

Built on

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S. Capozziello, M. DeLaurentis, S. Nojiri and S. D. Odintsov, Phys. Rev. D 79
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M. Bañados and P. G. Ferreira, Phys. Rev. Lett. 105
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