Journal
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
Volume 12, Issue 3, Pages 445-460Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218271803003049
Keywords
quintessence; Brans-Dicke scalar field
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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 scenario and is seen that the model allows growing modes for negative omega.
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