Multi-Field Inflation from String Theory

Understand

We construct a multi-field inflationary model consisting of multiple K\"ahler moduli derived from type IIB string compactification in the large volume limit.

• The model consists of both heavy and light fields, with the former being frozen during the inflationary period and the latter acting as the inflaton(s).
• We study the evolution of all the fields during and after inflation until the preheating era when all the fields oscillate around their vacuum expectation values.
• Our numerical analysis shows that the curvature perturbations have an almost scale invariant power spectrum with $n_s \simeq 0.96$.