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Oscillatory features in the curvature power spectrum after a sudden turn of the inflationary trajectory
Journal of Cosmology and Astroparticle Physics
In the context of two-field inflation characterized by a light direction and a heavy direction, we revisit the question of the impact of the massive modes on the power spectrum produced after a turn in the inflationary trajectory. We consider in particular the resonant effect due to the background oscillations following a sharp turn. Working in the mass basis, i.e. in the basis spanned by the eigenvectors of the effective mass matrix for the perturbations, we provide an analytical estimate ofdoi:10.1088/1475-7516/2013/10/023 fatcat:jor5qil5gje4ndqjjgdehmhbxe