Unified Model of -Inflation, Dark Matter & Dark Energy
Jul, 2009Citations per year
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 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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