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The European Physical Journal C

, Volume 52, Issue 1, pp 223–228 | Cite as

A FRW dark fluid with a non-linear inhomogeneous equation of state

  • I. Brevik
  • E. Elizalde
  • O. Gorbunova
  • A.V. Timoshkin
Regular Article - Theoretical Physics

Abstract

A dark Friedman–Robertson–Walker fluid governed by a non-linear inhomogeneous equation of state is considered that can be viewed as a conveniently simple paradigm for a whole class of models that exhibit phase transitions from a non-phantom towards a phantom era (superacceleration transition). On the other hand, such dark fluid models may also describe quintessence-like cosmic acceleration. Thermodynamical considerations for the processes involved, which are of great importance in the characterization of the global evolution of the corresponding universe, are given too. Connecting the proposed equation of state with an anisotropic Kasner universe with viscosity, we are led to the plausible conjecture of a dark fluid origin of the anisotropies in the early universe.

Keywords

Dark Energy Hubble Parameter Bulk Viscosity Dark Fluid Simple Paradigm 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag / Società Italiana di Fisica 2007

Authors and Affiliations

  • I. Brevik
    • 1
  • E. Elizalde
    • 2
  • O. Gorbunova
    • 3
  • A.V. Timoshkin
    • 3
  1. 1.Department of Energy and Process EngineeringNorwegian University of Science and TechnologyTrondheimNorway
  2. 2.Facultat de CiènciesInstituto de Ciencias del Espacio (CSIC) and Institut d’Estudis Espacials de Catalunya (IEEC/CSIC) Campus UABBellaterra (Barcelona)Spain
  3. 3.Tomsk State Pedagogical UniversityTomskRussia

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