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2007

Curvature Inspired Cosmological Scenario

Srivastava, S. K.

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Using modified gravity with non-linear terms of curvature, $R^2$ and $R^{(r +2)}$ (with $r$ being the positive real number and $R$ being the scalar curvature), cosmological scenario,beginning at the Planck scale, is obtained.

Here, a unified picture of cosmology is obtained from $f(R)-$ gravity.
In this scenario, universe begins with power-law inflation, followed by deceleration and acceleration in the late universe as well as possible collapse of the universe in future.
It is different from $f(R)-$ dark energy models with non-linear curvature terms assumed as dark energy.

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S.K.Srivastava and K.P.Sinha; Phys.Lett.B, 307
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2003
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