Description |
This talk is largely divided into two parts. In the first half of the talk, I shall discuss the generation of localized as well as non-local features (i.e. characteristic and repeated patterns that extend over a wide range of scales)
in the inflationary scalar power spectrum that lead to a better fit to the CMB data than the conventional power law spectrum.
In the second half, I shall discuss the bi-spectra that result in such scenarios, and how they compare with the current observational limits on the parameter f_NL.
Towards the end, time permitting, I shall also briefly discuss the effects of preheating in single field inflationary models on the evolution of the bi-spectrum.
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