Enhancement of non-Gaussianity after inflation

Aug, 2003
12 pages
Published in:
  • JHEP 04 (2004) 006
e-Print:
Report number:
  • DFPD-A-03-32

Citations per year

20032008201320182023024681012
Abstract: (arXiv)
We study the evolution of cosmological perturbations on large scales, up to second order, for a perfect fluid with generic equation of state. Taking advantage of super-horizon conservation laws, it is possible to follow the evolution of the non-Gaussianity of perturbations through the different stages after inflation. We find that a large non-linearity is generated by the gravitational dynamics from the original inflationary quantum fluctuations. This leads to a significant enhancement of the tiny intrinsic non-Gaussianity produced during inflation in single-field slow-roll models.
  • inflation
  • fluid
  • effect: nonlinear
  • space-time: Robertson-Walker
  • space-time: perturbation
  • tensor: energy-momentum
  • Einstein equation