Eternal Inflation with alpha'-Corrections
arXiv:hep-th/0507079 · doi:10.1088/1475-7516/2005/11/003
Abstract
Higher-order alpha'-corrections are a generic feature of type IIB string compactifications. In KKLT-like models of moduli stabilization they provide a mechanism of breaking the no-scale structure of the volume modulus. We present a model of inflation driven by the volume modulus of flux compactifications of the type IIB superstring. Using the effects of gaugino condensation on D7-branes and perturbative alpha'-corrections the volume modulus can be stabilized in a scalar potential which simultaneously contains saddle points providing slow-roll inflation with about 130 e-foldings. We can accommodate the 3-year WMAP data with a spectral index of density fluctuations n_s=0.93. Our model allows for eternal inflation providing the initial conditions of slow-roll inflation.
24 pages, 5 figures, LaTeX, v4: includes comparison with 3-year WMAP data and values for the tensor ratio r and the running of n_s
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