Rip behaviour in Brans-Dicke theory

被引：0

作者：

Pradhan, Sasmita K. ^{[1
,2
]}

Naik, Z. ^{[1
]}

Tripathy, S. K. ^{[3
]}

机构：

[1] Sambalpur Univ, Sch Phys, Sambalpur 768019, Odisha, India

[2] Centurion Univ Technol & Management, Dept Phys, R Sitapur, Odisha, India

[3] Indira Gandhi Inst Technol, Dept Phys, Dhenkanal 759146, Odisha, India

来源：

CHINESE JOURNAL OF PHYSICS | 2023年 / 85卷

关键词：

Generalised Brans-Dicke theory; Little rip; Pseudo rip;

D O I：

10.1016/j.cjph.2023.06.015

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this work, we present little rip and pseudo rip scenarios in the framework of the generalised Brans-Dicke (GBD) theory where an evolving BD parameter along with a self-interacting potential is considered. The GBD field equations are derived for an anisotropic space time to provide a more general approach to the cosmic expansion. The evolutionary behaviour of the Brans-Dicke (BD) scalar field, dynamical Brans-Dicke parameter and the self interacting potential are studied. It is not possible to separate out the dynamical Brans-Dicke parameter into distinct evolving and non-evolving part for the rip scenarios as is obtained for constant deceleration parameter. While the little rip behaviour requires a positive value for the GBD parameter, a small negative value around -1.33 favours a pseudo rip behaviour.

引用

页码：277 / 284

页数：8

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