Dynamical analysis for a vector-like dark energy

The European Physical Journal C

Ricardo C. G. Landim¹ 

[1] Departamento de Física-Matemática, Instituto de Física, Universidade de São Paulo, Rua do Matão, Travessa R, 187, Cidade Universitária, 05508-090, São Paulo, SP, Brazil;

关键词: Dark Energy;    Accelerate Expansion;    Dynamical System Theory;    Dark Sector;    Tachyon Field;   

DOI  :  10.1140/epjc/s10052-016-4328-x

来源: Springer

【 摘 要 】

In this paper we perform a dynamical analysis for a vector field as a candidate for the dark energy, in the presence of a barotropic fluid. The vector is one component of the so-called cosmic triad, which is a set of three identical copies of an abelian field pointing mutually in orthogonal directions. In order to generalize the analysis, we also assumed the interaction between dark energy and the barotropic fluid, with a phenomenological coupling. Both matter and dark energy eras can be successfully described by the critical points, indicating that the dynamical system theory is a viable tool to analyze asymptotic states of such cosmological models.

【 授权许可】

CC BY