Non-Gaussianity from Step Features in the Inflationary Potential

  title={Non-Gaussianity from Step Features in the Inflationary Potential},
  author={Peter Adshead and C. Dvorkin and W. Hu and E. Lim},
  journal={Physical Review D},
  • Peter Adshead, C. Dvorkin, +1 author E. Lim
  • Published 2012
  • Physics
  • Physical Review D
  • We provide analytic solutions for the power spectrum and bispectrum of curvature fluctuations produced by a step feature in the inflaton potential, valid in the limit that the step is short and sharp. In this limit, the bispectrum is strongly scale dependent and its effective non-linearity attains a large oscillatory amplitude. The perturbations to the curvature power spectrum, on the other hand, remain a small component on top of the usual spectrum of fluctuations generated by slow roll. We… CONTINUE READING
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