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Paper   IPM / Astronomy / 12915
School of Astronomy
  Title:   Fluid Inflation
  Author(s): 
1.  Xingang Chen
2.  Hassan Firouzjahi
3.  Mohammad Hossein Namjoo
4.  Misao Sasaki
  Status:   Published
  Journal: JCAP
  Year:  2013
  Pages:   13
  Supported by:  IPM
  Abstract:
In this work we present an inflationary mechanism based on fluid dynamics. Starting with the action for a single barotropic perfect fluid, we outline the procedure to calculate the power spectrum and the bispectrum of the curvature perturbation. It is shown that a perfect barotropic fluid naturally gives rise to a non-attractor inflationary universe in which the curvature perturbation is not frozen on super-horizon scales. We show that a scale-invariant power spectrum = can be obtained with the local non-Gaussianity parameter fNL = 5/2.

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