Attractors in F ( Q, B )-gravity

被引：5

作者：

Paliathanasis, Andronikos ^{[1
,2
]}

机构：

[1] Durban Univ Technol, Inst Syst Sci, ZA-4000 Durban, South Africa

[2] Univ Catolica Norte, Dept Matemat, Avda Angamos 0610, Casilla 1280, Antofagasta, Chile

来源：

PHYSICS OF THE DARK UNIVERSE | 2024年 / 45卷

基金：

新加坡国家研究基金会;

关键词：

Cosmology; Symmetric teleparallel; Boundary term; f(Q; C)-theory; Attractors; F(R) THEORIES; GRAVITY;

D O I：

10.1016/j.dark.2024.101519

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the asymptotic behavior of the cosmological field equations in Symmetric Teleparallel General Relativity, where a nonlinear function of the boundary term is introduced instead of the cosmological constant to describe the acceleration phase of the universe. Our analysis reveals constraints on the free parameters necessary for the existence of an attractor that accurately represents acceleration. However, we also identify asymptotic solutions depicting Big Rip and Big Crunch singularities. To avoid these solutions, we must impose constraints on the phase-space, requiring specific initial conditions.

引用

页数：7

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