We calculate curvature perturbations in the scenario in which the curvaton field decays into another scalar field via parametric resonance. As a result of a nonlinear stage at the end of the resonance, standard perturbative calculation techniques fail in this case. Instead, we use lattice field theory simulations and the separate universe approximation to calculate the curvature perturbation as...

The lens-less technique of microwave holography is expected to provide information three-dimensional structures plasma with a wide field view. From the complex amplitudes waves, which are observed on single planar array antennas, we will be able obtain an imaging object. With geometry back-scattering observation, feasibility examined numerical tool electromagnetic analysis dielectric objects. r...