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.