Natural Inflation, Planck Scale Physics and Oscillating Primordial Spectrum

Abstract

In the ``natural inflation'' model, the inflaton potential is periodic. We show that Planck scale physics may induce corrections to the inflaton potential, which is also periodic with a greater frequency. Such high frequency corrections produce oscillating features in the primordial fluctuation power spectrum, which are not entirely excluded by the current observations and may be detectable in high precision data of cosmic microwave background (CMB) anisotropy and large scale structure (LSS) observations.

20 pages, 11 figures. To appear in Int J Mod. Phys. D

References in corpus (3)

• The 2dF Galaxy Redshift Survey: The power spectrum and the matter content of the universe
• On the Signature of Short Distance Scale in the Cosmic Microwave Background
• Acoustic Oscillations in the Early Universe and Today

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