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تسجيل مستخدم جديدKahler moduli double inflation
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We show that double inflation is naturally realized in Kahler moduli inflation, which is caused by moduli associated with string compactification. We find that there is a small coupling between the two inflatons which leads to amplification of perturbations through parametric resonance in the intermediate stage of double inflation. This results in the appearance of a peak in the power spectrum of the primordial curvature perturbation. We numerically calculate the power spectrum and show that the power spectrum can have a peak on observationally interesing scales. We also compute the TT-spectrum of CMB based on the power spectrum with a peak and see that it better fits WMAP 7-years data.
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In this talk, I discuss the effects, viability, and predictions of the string-theory-motivated Kahler Moduli Inflation I (KMII) potential, coupled to a light scalar field $chi$, which can provide a possible source for todays dark energy density due t
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