Growing of the inhomogeneities and acceleration phase in a universe with lambda decay

Abstract

We study a model with decay of dark energy and creation of the dark matter particles. We integrate the field equations and find the transition redshift where the evolution process of the universe change from decelerated to an accelerated phase expansion, and briefly discuss the transition epoch and the broken of the strong energy condition. Finally, we examine the growing of the inhomogeneities.

Calculating the Acceleration of the Universe by Using the Constant Time Hyper Surfaces

“…Another suggestions are that the acceleration of the universe is due to a new long-range forces, the smallness of neutrino masses, it may signal that general relativity breaks down on cosmological scales and must be replaced (Frieman et al, 2008 ), and the acceleration is caused by quintessence in the form of a scalar field slowly evolving down a potential (Linder, 2007). An alternative approaches to the problem of accelerated universe use the particle creation process due to the expenses of the gravitational field or the creation of dark matter particle at the expenses of Λ-decay (de Campos, 2007) This work suggests an explanation based, firstly, on the assumption that the universe is a black hole, and secondly, on previous results (Alobayde,1995) obtained from treating the particle creation by strong gravitational field, as a transformation of virtual particle described with ( ) to real particles described with ( ).…”