The dark energy equation of state

TL;DR

This paper investigates a phenomenological model of dark energy with a dynamic equation of state, linking cosmic evolution, inflation, and potential connections to the Higgs boson, using a simple $ m \Lambda$ model.

Contribution

It introduces a novel $ m \Lambda$ model with a time-dependent equation of state parameter, explaining different cosmic expansion phases with a unified set of equations.

Findings

Inflationary and linearly expanding universes explained by the model

One parameter of the equation of state is pinpointed, the other delineated

Potential connection established between dark energy and the Higgs-Boson

Abstract

We perform a study of cosmic evolution with an equation of state parameter $\omega(t)=\omega_0+\omega_1(t\dot H/H)$ by selecting a phenomenological $\Lambda$ model of the form, $\dot\Lambda\sim H^3$. 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, $\omega(t)$, 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.