Dark Energy Models With Variable Equation Of State Parameter

Abstract

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.

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

References in corpus (9)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Dynamics of dark energy
• Tests of the Gravitational Inverse-Square Law below the Dark-Energy Length Scale
• The Dark Universe
• Cosmic Acceleration, Dark Energy and Fundamental Physics
• Cosmology with decaying tachyon matter
• $\Lambda$-CDM Universe: A Phenomenological Approach With Many Possibilities
• Do Solar system tests permit higher dimensional general relativity?
• Kaluza-Klein Type Robertson Walker Cosmological Model With Dynamical Cosmological Term $\Lambda$

Cited by in corpus (5)

• Dark Energy Model in Anisotropic Bianchi Type-III Space-Time with Variable EoS Parameter
• Variable Equation of State for Generalized Dark Energy Model
• Time variable $\Lambda$ and the accelerating Universe
• Five Dimensional Cosmological Models in General Relativity
• Scenario of Accelerating Universe from the Phenomenological Λ- Models