منابع مشابه
Scalar Field Inhomogeneous Cosmologies
Some exact solutions for the Einstein eld equations corresponding to inhomogeneous G2 cosmologies with an exponential-potential scalar eld which generalize solutions obtained previously are considered. Several particular cases are studied and the properties related to generalized in ation and asymptotic behaviour of the models are discussed.
متن کاملAsymptotic behaviour of a class of inhomogeneous scalar field cosmologies
The asymptotic behaviour of a class of inhomogeneous scalar field cosmologies with a Liouville type of potential is studied. We define a set of new variables for which the phase space of the system of Einstein equations is bounded. This allows us to perform a complete analysis of the evolution of these cosmologies. We also discuss the extension of the cosmic no-hair theorem.
متن کاملExact Conformal Scalar Field Cosmologies ∗
New exact solutions of Einstein’s gravity coupled to a self-interacting conformal scalar field are derived in this work. Our approach extends a solution-generating technique originally introduced by Bekenstein for massless conformal scalar fields. Solutions are obtained for a FriedmannRobertson-Walker geometry both for the cases of zero and non-zero curvatures, and a variety of interesting feat...
متن کاملScalar Field Cosmologies with Viscous Fluid
We investigate cosmological models with a free scalar field and a viscous fluid. We find exact solutions for a linear and nonlinear viscosity pressure. Both yield singular and bouncing solutions. In the first regime, a de Sitter stage is asymptotically stable, while in the second case we find power-law evolutions for vanishing cosmological constant. PACS 04.20 Jb, 04.40 Nr, 98.80 Hw
متن کاملOn the Evolution of a Large Class of Inhomogeneous Scalar Field Cosmologies
The asymptotic behaviour of a family of inhomogeneous scalar field cosmologies with exponential potential V = Λe is studied. By introducing new variables we can perform an almost complete analysis of the evolution of these cosmologies. Unlike the homogeneous case (Bianchi type solutions), when k2 < 2 the models do not isotropize due to the presence of the inhomogeneities.
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ژورنال
عنوان ژورنال: Journal of Mathematical Physics
سال: 1995
ISSN: 0022-2488,1089-7658
DOI: 10.1063/1.530931