Unified Model of kk-Inflation, Dark Matter & Dark Energy

Jul, 2009
7 pages
Published in:
  • Phys.Rev.D 80 (2009) 103508
e-Print:

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Abstract: (arXiv)
We present a \textit{k}-essence model where a single scalar field is responsible for the early expansion of the universe through the process of \textit{k}-inflation and at appropriate subsequent stages acts both as dark matter and dark energy. The Lagrangian contains a potential for the scalar field as well as a non-canonical kinetic term, and is of the form F(X)V(ϕ)F(X)V(\phi) which has been widely used as a \textit{k}-essence Lagrangian. After the period of inflation is over the model can be approximated as purely kinetic \textit{k}-essence, generating dark matter and dark energy at late times. We show how observational results are used to put constraints on the parameters of this model.
Note:
  • 7 pages, Revtex; references added, minor changes made to match with version published in Phys. Rev. D
  • 95.36.+x
  • 98.80.-k
  • 98.80.Cq
  • field theory: scalar
  • dark matter
  • dark energy
  • inflation
  • model: k-essence
  • potential
  • power spectrum
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