http://arxiv.org/abs/1605.01475
In this work we discuss observational aspects of three time-dependent parameterisations of the dark energy equation of state $w(z)$. In order to determine the dynamics associated with these models, we calculate their background evolution and perturbations in a scalar field representation. After performing a complete treatment of linear perturbations, we also show that the non-linear contribution of the selected $w(z)$ parameterisations to the matter power spectra is almost the same for all scales, with no significant difference from the predictions of the standard $\Lambda$CDM model.
C. Escamilla-Rivera, L. Casarini, J. Fabris, et. al.
Fri, 6 May 16
1/60
Comments: 17 pages, 6 figures
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