Dark energy and dust matter phases from an exact $f(R)$-cosmology model

Abstract

We show that dust matter-dark energy combined phases can be achieved by the exact solution derived from a power law $f(R)$ cosmological model. This example answers the query by which a dust-dominated decelerated phase, before dark-energy accelerated phase, is needed in order to form large scale structures.

6 pages, 5 figures. to appear in Phys. Lett. B

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