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TitleDynamics of Robertson-Walker spacetimes with diffusion
Author(s)Alho, Artur
Calogero, Simone Carmelo
Ramos, M. P. Machado
Soares, A. J.
Scalar field
Dynamical systems
Issue dateMar-2015
JournalAnnals of Physics
Abstract(s)We study the dynamics of spatially homogeneous and isotropic spacetimes containing a fluid undergoing microscopic velocity diffusion in a cosmological scalar field. After deriving a few exact solutions of the equations, we continue by analyzing the qualitative behavior of general solutions. To this purpose we recast the equations in the form of a two dimensional dynamical system and perform a global analysis of the flow. Among the admissible behaviors, we find solutions that are asymptotically de-Sitter both in the past and future time directions and which undergo accelerated expansion at all times.
Publisher versionThe on-line publication is available at
AccessOpen access
Appears in Collections:CMAT - Artigos em revistas com arbitragem / Papers in peer review journals

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