73 citations · 172 across the 9 of their papers we have counts for
9 papers
Construction and applications of the manifestly gauge invariant expressions of the solutions of the cosmological perturbation theory
Takashi Hamazaki
After giving how to construct the gauge invariant perturbation variable in an arbitrarily high order and in the arbitrary background spacetime, we consider the manifestly gauge inv…
Manifestly gauge invariant theory of the nonlinear cosmological perturbations in the leading order of the gradient expansion
Takashi Hamazaki
In the full nonlinear cosmological perturbation theory in the leading order of the gradient expansion, all the types of the gauge invariant perturbation variables are defined. The…
Long wavelength limit of evolution of nonlinear cosmological perturbations
Takashi Hamazaki
In the general matter composition where the multiple scalar fields and the multiple perfect fluids coexist, in the leading order of the gradient expansion, we construct all of the…
Long wavelength limit of evolution of cosmological perturbations in the universe where scalar fields and fluids coexist
Takashi Hamazaki
We present the LWL formula which represents the long wavelengh limit of the solutions of evolution equations of cosmological perturbations in terms of the exactly homogeneous solut…
Evolution of Cosmological Perturbations in the Universe dominated by Resonant Scalar Fields
Takashi Hamazaki
Recently a Hamiltonian formulation for the evolution of the universe dominated by multiple oscillatory scalar fields was developed by the present author and was applied to the inve…
Evolution of Cosmological Perturbations in the Universe dominated by Multiple Scalar Fields
Takashi Hamazaki
By efforts of several authors, it is recently established that the dynamical behavior of the cosmological perturbation on superhorizon scales is well approximated in terms of that…