Role of Brans-Dicke Theory with or without self-interacting potential in cosmic acceleration

TL;DR

This paper investigates how Brans-Dicke theory, with or without a self-interacting potential and varying or constant , can explain cosmic acceleration using power-law models of the universe and scalar field.

Contribution

It explores the conditions under which cosmic acceleration occurs in Brans-Dicke theory with different parameters and matter contents, including high  values and specific potential forms.

Findings

Accelerated expansion possible for high  in closed universe.

Cosmic acceleration achieved with both constant and varying .

Self-interacting potential influences acceleration conditions.

Abstract

In this work we have studied the possibility of obtaining cosmic acceleration in Brans-Dicke theory with varying or constant $\omega$ (Brans- Dicke parameter) and with or without self-interacting potential, the background fluid being barotropic fluid or Generalized Chaplygin Gas. Here we take the power law form of the scale factor and the scalar field. We show that accelerated expansion can also be achieved for high values of $\omega$ for closed Universe.