Non-Gaussianity in String Cosmology: A Case Study
  We study non-gaussianity effects, using the $\delta N$ formalism, in a
multi-field inflationary model consisting of K\"ahler moduli derived from type
IIB string compactification in the large volume limit. The analytical work in
this paper mostly follows the separable potential method developed by Vernizzi
and Wands. The numerical analysis is then used in computing non-gaussianity
beyond slow-roll regime. The possibility of the curvaton scenario is also
discussed. We give the condition for the existence of the curvaton and
calculate the non-guassianity generated by the curvaton decay in the large
volume limit.
