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IPM
30
YEARS OLD

“School of Physics”

Paper   IPM / P / 11774
   School of Physics
  Title: DBI Lifshitz Inflation
  Author(s):
1 . M. Alishahiha
2 . H. Firouzjahi
3 . M.H. Namjoo
  Status: Published
  Journal: JCAP
  Vol.: 08
  Year: 2011
  Pages: 028
  Supported by: IPM
  Abstract:
A new model of DBI inflation is introduced where the mobile brane, the inflaton field, is moving relativistically inside a Lifshitz throat with the arbitrary dynamical exponent z. The dependence of physical observable quantities, such as the spectral index, the ratio of the tensor to scalar amplitudes r and the non-Gaussianity parameter fNL, are calculated a functions of the exponent z. Depending on the value of z and the form of the inflaton potential the curvature perturbations can be red-tilted, scale invariant, or blue-tilted and significant amounts of non-Gaussianities can be produced.


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