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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.