2 papers
astro-ph.CO2015
Nonlinear Excitations in Inflationary Power Spectra
V Miranda, Wayne Hu, Chen He +1
We develop methods to calculate the curvature power spectrum in models where features in the inflaton potential nonlinearly excite modes and generate high frequency features in the…
astro-ph.CO2015
Compensated isocurvature perturbations in the curvaton model
Chen He, Daniel Grin, Wayne Hu
Primordial fluctuations in the relative number densities of particles, or isocurvature perturbations, are generally well constrained by cosmic microwave background (CMB) data. A le…