Dark Energy Models With Variable Equation Of State Parameter

Details Dark Energy Models With Variable Equation Of State Parameter Dark Energy Models With Variable Equation Of State Parameter

2007-11-29

arxiv.org/abs/0711.4800v3

Int.J.Mod.Phys.D19:475-487,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 Latex pages, a few changes in the text. Accepted in IJMPD

Scientific paper

10.1142/S0218271810016488

Two variable $\Lambda$ models, viz. $\Lambda \sim (\dot a/a)^2$ and $\Lambda
\sim \rho$ have been studied under the assumption that the equation of state
parameter $\omega$ is a function of time. The selected $\Lambda$ models are
found to be equivalent both in four and five dimensions. The possibility of
signature flip of the deceleration parameter is also shown.

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