“School of Physics”

Back to Papers Home
Back to Papers of School of Physics

Paper   IPM / P / 13499
School of Physics
  Title:   delta N Formalism in Anisotropic Inflation and Large Anisotropic Bispectrum and Trispectrum
1.  A.A. Abolhasani
2.  R. Emami
3.  J. T. Firouzjaee
4.  H. Firouzjahi
  Status:   Published
  Journal: JCAP
  Vol.:  1308
  Year:  2013
  Pages:   016
  Supported by:  IPM
We present the consistent N formalism for curvature perturbations in anisotropic cosmological backgrounds. We employ our N formalism to calculate the power spectrum, the bispectrum and the trispectrum in models of anisotropic inflation with the background gauge fields in Bianchi I universe. Our results coincide exactly with the recent results obtained from in-in formalism. To satisfy the observational constraints the anisotropies generated on power spectrum are kept small but large orientation-dependent non-Gaussianities can be generated. We study the Suyama-Yamaguchi inequality for the amplitudes of the bispectrum and the trispectrum in the presence of anisotropic shapes.

Download TeX format
back to top
scroll left or right