Dynamical description of a quintom cosmological model nonminimally coupled with gravity

被引：8

作者：

Marciu, Mihai ^{[1
]}

机构：

[1] Univ Bucharest, Fac Phys, 405 Atomistilor,POB MG-11, Bucharest 077125, Romania

来源：

EUROPEAN PHYSICAL JOURNAL C | 2020年 / 80卷 / 09期

关键词：

DARK ENERGY; SCALAR FIELD; CONSTRAINTS; SPACE; QUINTESSENCE; CURVATURE; SUPERNOVA; EVOLUTION; EQUATION; QUANTUM;

D O I：

10.1140/epjc/s10052-020-08476-9

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In this work we have studied a cosmological model based on a quintom dark energy model non-minimally coupled with gravity, endowed with a specific potential energy of the exponential squared type. For this specific type of potential energy and non-minimal coupling, the dynamical properties are analyzed and the corresponding cosmological effects are discussed. Considering the linear stability method, we have investigated the dynamical properties of the phase space structure, determining the physically acceptable solutions. The analysis showed that in this model we can have various cosmological epochs, corresponding to radiation, matter domination, and de Sitter eras. Each solution is investigated from a physical and cosmological point of view, obtaining possible constraints of the model's parameters. In principle the present cosmological setup represent a possible viable scalar tensor theory which can explain various transitional effects related to the behavior of the dark energy equation of state and the evolution of the Universe at large scales.

引用

页数：13

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