34 citations · 34 across the 1 of their papers we have counts for
2 papers
gr-qc2007★ 34 cited
Gradient expansion approach to nonlinear superhorizon perturbations II -- a single scalar field --
Yoshiharu Tanaka, Misao Sasaki
We formulate nonlinear perturbations of a scalar field dominated universe on super-horizon scales. We consider the case of a single scalar field. We take the gradient expansion app…
gr-qc2006
Gradient expansion approach to nonlinear superhorizon perturbations
Yoshiharu Tanaka, Misao Sasaki
Using the gradient expansion approach, we formulate a nonlinear cosmological perturbation theory on super-horizon scales valid to , where is the expansion parameter ass…