A non-singular bouncing cosmology in f(R,T) gravity

被引：27

作者：

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

Shaily ^{[1
]}

Singh, Akanksha ^{[1
]}

Beesham, Aroonkumar ^{[2
,3
,4
]}

Shabani, Hamid ^{[5
]}

机构：

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

[2] Univ Zululand, Dept Math Sci, ZA-3886 Kwa Dlangezwa, South Africa

[3] Mangosuthu Univ Technol, Fac Nat Sci, ZA-4031 Umlazi, South Africa

[4] Natl Inst Theoret & Comp Sci NITheCS, Stellenbosch, South Africa

[5] Univ Sistan & Baluchestan, Fac Sci, Phys Dept, Zahedan, Iran

来源：

ANNALS OF PHYSICS | 2023年 / 455卷

关键词：

Bouncing cosmology; f(R; T) gravity; FLRW metric; Parametrization; DARK ENERGY; F R; UNIVERSE; INFLATION; MODELS;

D O I：

10.1016/j.aop.2023.169382

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate a bounce realization in the framework of higher order curvature in f (R, T) modified theory of gravity. We perform a detailed analysis of the cosmological parameters to explain the contraction phase, the bounce phase, and the expansion phase. Furthermore, we observe a violation of the null energy condition, instability of the model, and a singularity upon deceleration at the bouncing point, which are the supporting results for a bouncing cosmology. The equation of state parameter exhibits a ghost condensate behavior of the model near the bouncing point. Additionally, we discuss the stability of the model using linear perturbations in the Hubble parameter as well as the energy density.& COPY; 2023 Elsevier Inc. All rights reserved.

引用

页数：13

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