Abstract
In this paper, we investigate Starobinky’s inflation model for scalar perturbation during cosmic inflation epoch by using Arnowitt-Deser-Misner (ADM) formalism. We implemented this formalism to the action of curvature-scalar of Starobinsky’s model, which is one of the models of cosmic inflation. As the result of this investigation, we found the power spectrum of scalar perturbation in the form of Starobinsky’s inflation model which has a linear correlation to the comoving Hubble radius which is shrinking during inflation epoch.
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