The Effect of de-Sitter Like Background on Increasing the Zero Point Budget of Dark Energy

Haidar Sheikhahmadi,Ali Aghamohammadi,Khaled Saaidi

doi:10.1155/2016/2594189

Abstract

During this work, using subtraction renormalization mechanism, zero point quantum fluctuations for bosonic scalar fields in a de-Sitter like background are investigated. By virtue of the observed value for spectral index,ns(k), for massive scalar field the best value for the first slow roll parameter,ϵ, is achieved. In addition, the energy density of vacuum quantum fluctuations for massless scalar field is obtained. The effects of these fluctuations on other components of the universe are studied. By solving the conservation equation, for some different examples, the energy density for different components of the universe is obtained. In the case which all components of the universe are in an interaction, the different dissipation functions,Q~i, are considered. The time evolution ofρDE(z)/ρcri(z)shows thatQ~=3γH(t)ρmhas the best agreement in comparison to observational data including CMB, BAO, and SNeIa data set.

Highlights

For a de-Sitter like background, to investigate the effects of the quantum fluctuations on the energy budget of the universe both massive and massless scalar fields are considered
The importance of this note is that whereas the zero point contribution of dark energy potentially is detectable, the possibility of dark energy detection is increased. It should be stressed, due to time dependency of Hubble parameter which appeared in energy density of zero point quantum fluctuations, energy can transfer between different components of the universe
As it was discussed in [3] zero point quantum fluctuations could be considered as subdark energy, and these extra terms in question can be proposed as subdark matter

Summary

Introduction

For a de-Sitter like background, to investigate the effects of the quantum fluctuations on the energy budget of the universe both massive and massless scalar fields are considered. One can estimate the best value of the first slow roll parameter based on observations, for instance, Planck 2013 [1] From this perspective, for zero point quantum fluctuations both energy density and pressure are calculated. The importance of this note is that whereas the zero point contribution of dark energy potentially is detectable, the possibility of dark energy detection is increased It should be stressed, due to time dependency of Hubble parameter which appeared in energy density of zero point quantum fluctuations, energy can transfer between different components of the universe. By considering this concept one can propose different manners to investigate interaction between zero point fluctuations and other sectors.

Massive Scalar Field and Slow Roll Parameters

Typical Example

Transformation of Energy between Different Components of the Universe

Bounds Which Are Risen from Time Evolution of Dark Energy

Conclusion and Discussion