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arXiv · 1511.02624

A coupled vacuum energy model producing endless alternated phases of accelerated and decelerated expansion

Stephane Fay
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Abstract

We consider a flat Universe filled with a vacuum energy coupled to matter and radiation by respectively positive coupling functions $Q_m$ and $Q_r$. We require that these functions be such as Universe exits from inflation to go to a radiation dominated epoch and allow to reproduce the observed $ΛCDM$ expansion after this last epoch. These requirements lead to some necessary constraints on the coupling functions. We then look at one of the simplest forms of $Q_m$ and $Q_r$ able to satisfy them. The cosmological model thus defined describes a Universe with an initial singularity and endless alternated periods of accelerated and decelerated expansion (one of them being our $ΛCDM$ Universe) unifying inflation and present time expansion acceleration.

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Stephane Fay. 2017-05-07. A coupled vacuum energy model producing endless alternated phases of accelerated and decelerated expansion. https://doi.org/10.1103/physrevd.95.083504

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