A transition between bouncing hyper-inflation to ACDM from diffusive scalar fields

作者：Benisty David^*; Guendelman Eduardo I

来源：International Journal of Modern Physics A, 2018, 33(20): 1850119.

DOI：10.1142/50217751X18501191

• Diffusion
• dark energy
• dark matter
• dynamical time
• two measure theories

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 (TMT) 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 Two Measures Theories gives a diffusive nonconservative stressenergy 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 ACDM is determined by the diffusion constant C-2. For C-2 = 0 the model is indistinguishable from ACDM. Numerical solutions of the theories show that in some C-2 not equal 0 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 ACDM as a stable fixed point for the late universe.

• 出版日期2018-7-20