English

The dark energy equation of state

General Relativity and Quantum Cosmology 2009-11-13 v2 Astrophysics High Energy Physics - Theory

Abstract

We perform a study of cosmic evolution with an equation of state parameter ω(t)=ω0+ω1(tH˙/H)\omega(t)=\omega_0+\omega_1(t\dot H/H) by selecting a phenomenological Λ\Lambda model of the form, Λ˙H3\dot\Lambda\sim H^3. This simple proposition explains both linearly expanding and inflationary Universes with a single set of equations. We notice that the inflation leads to a scaling in the equation of state parameter, ω(t)\omega(t), and hence in equation of state. In this approach, one of its two parameters have been pin pointed and the other have been delineated. It has been possible to show a connection between dark energy and Higgs-Boson.

Keywords

Cite

@article{arxiv.0801.4529,
  title  = {The dark energy equation of state},
  author = {A. A. Usmani and P. P. Ghosh and Utpal Mukhopadhyay and P. C. Ray and Saibal Ray},
  journal= {arXiv preprint arXiv:0801.4529},
  year   = {2009}
}

Comments

4 Latex pages, 3 figures, To appear in Mon. Not. R. Astron. Soc. Lett

R2 v1 2026-06-21T10:07:36.337Z