Making waves on CMB power spectrum and inflaton dynamics

Abstract

We discuss cosmic microwave background anisotropies in models with an unconventional primordial power spectrum. In particular, we consider an initial power spectrum with some ``spiky'' corrections. Interestingly, such a primordial power spectrum generates ``wavy'' structure in the CMB angular power spectrum.

Comments: 8 pages, 2 figures, version accepted for publication in Physics Letters B; several references are added