Bouncing cosmology in modified gravity with higher-order curvature terms

被引：37

作者：

Singh, J. K. ^{[1
]}

Balhara, Harshna ^{[1
]}

Bamba, Kazuharu ^{[2
]}

Jena, J. ^{[1
]}

机构：

[1] Netaji Subhas Univ Technol, Dept Math, New Delhi 110078, India

[2] Fukushima Univ, Fac Symbiot Syst Sci, Div Human Support Syst, Fukushima 9601296, Japan

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2023年 / 2023卷 / 03期

关键词：

Classical Theories of Gravity; Cosmology of Theories BSM; Spacetime Singularities; NULL ENERGY CONDITION; DARK ENERGY; INFLATIONARY COSMOLOGY; PHANTOM; QUANTUM; DYNAMICS; EQUATION; MODELS;

D O I：

10.1007/JHEP03(2023)191

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：

A bouncing scenario of a flat homogeneous and isotropic universe is explored by using the reconstruction technique for the power-law parametrization of the Hubble parameter in a modified gravity theory with higher-order curvature and trace of the energy-momentum tensor terms. It is demonstrated that bouncing criteria are satisfied so that the cosmological initial singularity can be avoided. In addition, it is shown that the equation of state parameter crosses the line of the phantom divide. In the present scenario, the universe is filled with perfect fluid around the bouncing point, in which the universe becomes highly unstable and a big bounce can be realized. Furthermore, it is found that extremal acceleration occurs at the bouncing point.

引用

页数：21

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