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arXiv · 1605.01475

Linear and non-linear perturbations in dark energy models

Celia Escamilla-Rivera·Luciano Casarini·Julio C. Fabris·Jailson S. Alcaniz
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Abstract

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.

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Celia Escamilla-Rivera, Luciano Casarini, Julio C. Fabris, Jailson S. Alcaniz. 2016-05-05. Linear and non-linear perturbations in dark energy models. https://doi.org/10.1088/1475-7516%2F2016%2F11%2F010

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