Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10725220 | Physics Letters B | 2007 | 5 Pages |
Abstract
A cosmological model has been constructed with Gauss-Bonnet-scalar interaction, where the Universe starts with exponential expansion but encounters infinite deceleration, qââ and infinite equation of state parameter, wââ. During evolution it subsequently passes through the stiff fluid era, q=2, w=1, the radiation dominated era, q=1, w=1/3 and the matter dominated era, q=1/2, w=0. Finally, deceleration halts, q=0, w=â1/3, and it then encounters a transition to the accelerating phase. Asymptotically the Universe reaches yet another inflationary phase qââ1, wââ1. Such evolution is independent of the form of the potential and the sign of the kinetic energy term, i.e., even a non-canonical kinetic energy is unable to phantomize (w<â1) the model.
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Authors
Abhik Kumar Sanyal,