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Paper   IPM / Astronomy / 13911
School of Astronomy
  Title:   Inflation with Fractional Potential: A Comprehensive Study
  Author(s): 
1.  M. Eshaghi
2.  M. Zarei
3.  N. Riazi
4.  A. Kiasatpour
  Status:   Published
  Journal: arXiv
  Year:  2015
  Supported by:  IPM
  Abstract:
In this work we consider an inflationary potential in fractional form coupled non-minimally to gravity. This potential has a dominant constant energy density at early times which can realize successful inflation. We show that this potential predicts small tensor-to-scalar ratio of the order of r ≈ 0.01 which is fully consistent with Planck constraints. Using the lower and upper bounds on reheating temperature, we provide additional constraints on the non-minimally coupling parameter ξ of the model. We also study the preheating stage predicted by this kind of potentials using numerical calculations.

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