A Simple Quintessence Model

M. C. Bento; R. Gonzalez Felipe; N. M. C. Santos

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arXiv · 0809.1679

A Simple Quintessence Model

M. C. Bento·R. Gonzalez Felipe·N. M. C. Santos

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Abstract

A simple model of quintessential inflation with the modified exponential potential $e^{-αϕ} [A+(ϕ-ϕ_0)^2]$ is analyzed in the braneworld context. Considering reheating via instant preheating, we conclude that the model exhibits transient acceleration at late times for $0.96 \lesssim A α^2 \lesssim 1.26$ and $271 \lesssim ϕ_0 α\lesssim 273$, while permanent acceleration is obtained for $2.3\times10^{-8} \lesssim A α^2 \lesssim 0.98$ and $255 \lesssim ϕ_0 α\lesssim 273$. The steep parameter $α$ is constrained to be in the range $5.3 \lesssim α\lesssim 10.8$.

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M. C. Bento, R. Gonzalez Felipe, N. M. C. Santos. 2008-09-10. A Simple Quintessence Model. https://arxiv.org/abs/0809.1679

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