Tensor to scalar ratio of perturbation amplitudes and inflaton dynamics
Sep, 2002Citations per year
Abstract: (Elsevier)
In this Letter some details of the relation between the tensor to scalar amplitudes ratio r and the inflationary dynamics are pointed out which are relevant for the classification and reconstruction of the inflationary potential. For the inflaton perturbations it is shown that the evolution of the difference between the spectral indices can be translated into information on the scale dependence of r , and how the scalar field potential can be derived from that information. Examples are given where r converges to a constant value during inflation but dynamics are rather different from the power-law model. Cases are presented where a constant r is not characteristic of the inflationary dynamics though the resulting perturbation spectra are consistent with the CMB and LSS data.- 98.80.Cq
- 98.80.Es
- 98.70.Vc
- inflation
- inflaton: potential
- perturbation: scalar
- perturbation: tensor
- numerical calculations
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