Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/33733

TitleDynamics of Robertson-Walker spacetimes with diffusion
Author(s)Alho, Artur
Calogero, Simone Carmelo
Ramos, M. P. Machado
Soares, A. J.
KeywordsCosmology
Diffusion
Scalar field
Dynamical systems
Issue dateMar-2015
PublisherElsevier
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.
TypeArticle
URIhttp://hdl.handle.net/1822/33733
DOI10.1016/j.aop.2015.01.010
ISSN0003-4916
Publisher versionThe on-line publication is available at www.sciencedirect.com/science/article/pii/S0003491615000135#
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CMAT - Artigos em revistas com arbitragem / Papers in peer review journals

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