Self interacting Brans Dicke cosmology and Quintessence

Abstract

Recent cosmological observations reveal that we are living in a flat accelerated expanding universe. In this work we have investigated the nature of the potential compatible with the power law expansion of the universe in a self interacting Brans Dicke cosmology with a perfect fluid background and have analyzed whether this potential supports the accelerated expansion. It is found that positive power law potential is relevant in this scenario and can drive accelerated expansion for negative Brans Dicke coupling parameter $\omega$. The evolution of the density perturbation is also analyzed in this scenerio and is seen that the model allows growing modes for negative $\omega$.

8pages, 5 figures, PRD style, some changes are made, figures added, reference added. To be published in Int. J. Mod. Phys. D

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• Time Evolution of the Matter Content of the Expanding Universe in the Framework of Brans-Dicke Gravity
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• Instability Analysis of Cylindrical Stellar Object in Brans-Dicke Gravity
• Extended holographic Ricci dark energy in chameleon Brans-Dicke cosmology
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• Late time acceleration in 3-brane Brans-Dicke cosmology
• Quark-hadron phase transition in DGP including BD brane
• Can hyperbolic phase of Brans-Dicke field account for Dark Matter?
• Gravitational Wave Solutions to Linearized Jordan-Brans-Dicke Theory on a Cosmological Background
• Inflation and Linear Expansion in the Radiation Dominated era in Jordan-Brans-Dicke Cosmology
• A New Approach to Flatness, Horizon and Late-time Accelerating Expansion Problems on the basis of Mach Principle
• A Study of the Time Evolution of Brans-Dicke Parameter and its Role in Cosmic Expansion