The dark energy equation of state

A. A. Usmani, P. P. Ghosh, Utpal Mukhopadhyay +2

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 si…