First-order formalism for dark energy and dust

Abstract

This work deals with first-order formalism for dark energy and dust in standard cosmology, for models described by real scalar field in the presence of dust in spatially flat space. The field dynamics may be standard or tachyonic, and we show how the equations of motion can be solved by first-order differential equations. We investigate a model to illustrate how the dustlike matter may affect the cosmic evolution using this framework.

5 pages, 1 figure; title changed, new author included, discussions extended, references added, version to appear in EPJC

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Cited by in corpus (16)

• First-order framework and generalized global defect solutions
• Supersymmetric extensions of k-field models
• Superpotential method for chiral cosmological models connected with modified gravity
• The First-Order Euler-Lagrange equations and some of their uses
• On the many-field f(R) brane
• Quintessence and tachyon dark energy models with a constant equation of state parameter
• Two scalar field cosmology from coupled one-field models
• Nonminimal coupling inflation with constant slow roll
• Exact cosmological solutions of models with an interacting dark sector
• Superpotential method for $F(R)$ cosmological models
• The generalized $sl(2,R)$ and $su(1,1)$ in non-minimal constant-roll inflation
• Impact of Lorentz violation on the dynamics of inflation
• Inflationary Twin Models
• Lorentz-preserving fields in Lorentz-violating theories
• Cosmological scalar perturbations in Horndeski-like gravity
• Kinklike structures in an arcsin real scalar dynamics