Evolution of density perturbations in double exponential quintessence models |
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| Authors: | Tame Gonzalez Rolando Cardenas Israel Quiros Yoelsy Leyva |
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| Institution: | 1. Gravitation and Cosmology Group, Physics Department, Las Villas Central University, Carretera a Camajuani, Km 5 ?, CP# 54830, Santa Clara, Villa Clara, Cuba
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| Abstract: | In this work we investigate the evolution of matter (linear) density perturbations for quintessence models with a self-interaction
potential that is a combination of exponentials. One of the models is based on the Einstein theory of gravity, while the other
is based on the Brans-Dicke scalar tensor theory. We constrained the parameter space of the models by using the determinations
of the growth rate of perturbations derived from data of the 2-degree Field Galaxy Redshift Survey.
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| Keywords: | Dark energy Linear perturbation theory |
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