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arXiv · gr-qc/0103098

Cosmology in scalar tensor theory and asymptotically de-Sitter Universe

A. A. Sen·S. Sen
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Abstract

We have investigated the cosmological scenarios with a four dimensional effective action which is connected with multidimensional, supergravity and string theories. The solution for the scale factor is such that initially universe undergoes a decelerated expansion but in late times it enters into the accelerated expansion phase. Infact, it asymptotically becomes a de-Sitter universe. The dilaton field in our model is a decreasing function of time and it becomes a constant in late time resulting the exit from the scalar tensor theory to the standard Einstein's gravity. Also the dilaton field results the existence of a positive cosmological constant in late times.

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A. A. Sen, S. Sen. 2001-03-27. Cosmology in scalar tensor theory and asymptotically de-Sitter Universe. https://doi.org/10.1142/s021773230100442x

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