A transition between bouncing hyper-inflation to {\Lambda}CDM from diffusive scalar fields
Abstract
We consider the history of the universe from a possible big bang or a bounce into a late period of a unified interacting dark energy - dark matter model. The model is based on the Two Measures Theories (T.M.T.) which introduces a metric independent volume element and this allows us to construct a unification of dark energy and dark matter. A generalization of the T.M.T. gives a diffusive non-conservative stress energy momentum tensor in addition to the conserved stress energy tensor which appear in Einstein equations. These leads to a formulation of interacting DE-DM dust models in the form of a diffusive type interacting Unified Dark Energy and Dark Matter scenario. The deviation from CDM is determined by the diffusion constant . For the model is indistinguishable from CDM. Numerical solutions of the theories show that in some the evolution of the early universe is governed by Stiff equation of state or the universe bounces to hyper inflation. But all of those solutions have a final transition to CDM as a stable fixed point for the late universe.
Cite
@article{arxiv.1710.10588,
title = {A transition between bouncing hyper-inflation to {\Lambda}CDM from diffusive scalar fields},
author = {David Benisty and Eduardo I. Guendelman},
journal= {arXiv preprint arXiv:1710.10588},
year = {2018}
}
Comments
Updated version, before acceptance for publication