Cosmic Evolution in Self-Interacting Brans-Dicke Cosmology

摘要

In this paper, we investigate the nature of self-interacting potential thatcan support the accelerated expansion of the universe as indicated byobservational data. For this purpose, we consider the Bianchi type I (BI)universe model in the Brans-Dicke (BD) field scenario and use a power law forboth the scalar field and the scale factor. It is found that the acceleratedexpansion of the universe can be discussed for a positive power law potentialwith negative values of the BD parameter. We also explore the evolution ofenergy density perturbations. This analysis indicates that the model allowsgrowing modes for negative values of the BD parameter and $m>0$.