Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2008-01-29
Mon.Not.Roy.Astron.Soc.Lett.386:L92-95,2008
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
4 Latex pages, 3 figures, To appear in Mon. Not. R. Astron. Soc. Lett
Scientific paper
10.1111/j.1745-3933.2008.00468.x
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.
Ghosh Partha Pratim
Mukhopadhyay Utpal
Ray Paresh C.
Ray Saibal
Usmani A. A.
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