Multi-Field Inflation from String Theory

Abstract

We construct a multi-field inflationary model consisting of multiple Kähler 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 $n_s\simeq 0.96$.

25 pages, 17 figures

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Cited by in corpus (8)

• Strongly Coupled Perturbations in Two-Field Inflationary Models
• Reheating the Universe After Multi-Field Inflation
• Two scalar field cosmology: Conservation laws and exact solutions
• Non-standard primordial fluctuations and nongaussianity in string inflation
• Modified Supergravity and Early Universe: the Meeting Point of Cosmology and High-Energy Physics
• The Strong Multifield Slowroll Condition and Spiral Inflation
• Kahler moduli double inflation
• Non-Gaussianity in String Cosmology: A Case Study