The dark energy equation of state

Abstract

We perform a study of cosmic evolution with an equation of state parameter ω(t) = ω0 + ω0>1 (tḢ/H) by selecting a phenomenological L Λ model of the form, LΛ̇ ~ H3. This simple proposition explains both linearly expanding and inflationary universes with a single set of equation. We note that the inflation leads to a scaling in the equation of state parameter, ω(t), and hence in equation of state. In this approach, one of its two parameters has been pin pointed and the other has been delineated. It has been possible to show a connection between dark energy and Higgs-Boson. © 2008 The Authors. Journal compilation © 2008 RAS.