Utilize este identificador para referenciar este registo: http://hdl.handle.net/1822/33733

TítuloDynamics of Robertson-Walker spacetimes with diffusion
Autor(es)Alho, Artur
Calogero, Simone
Ramos, M. P. Machado
Soares, A. J.
Scalar field
Dynamical systems
RevistaAnnals of Physics
Resumo(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.
Versão da editoraThe on-line publication is available at www.sciencedirect.com/science/article/pii/S0003491615000135#
Arbitragem científicayes
Aparece nas coleções:CMAT - Artigos com arbitragem/Papers with refereeing

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
Dyn_RW_SpacTimes_Diffusion_2Jan2015.pdfVersão dos autores para a publicação.392,69 kBAdobe PDFVer/Abrir

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