M
Masahide Yamaguchi
Researcher at Tokyo Institute of Technology
Publications - 78
Citations - 4774
Masahide Yamaguchi is an academic researcher from Tokyo Institute of Technology. The author has contributed to research in topics: Inflation (cosmology) & Primordial fluctuations. The author has an hindex of 30, co-authored 68 publications receiving 4317 citations. Previous affiliations of Masahide Yamaguchi include Aoyama Gakuin University.
Papers
More filters
Journal ArticleDOI
Generalized G-Inflation —Inflation with the Most General Second-Order Field Equations—
TL;DR: In this paper, the generalized Galileons were used as a framework to develop the most general single-field inflation models ever, Generalized G-inflation, containing yet further generalization of Ginf lation, as well as previous examples such as k-inflation, extended inflation, and new Higgs inflation as special cases.
Journal ArticleDOI
Inflation driven by the Galileon field.
TL;DR: It is shown that (almost) scale-invariant curvature fluctuations can be generated even in the exactly de Sitter background and that the tensor-to-scalar ratio can take a significantly larger value than in the standard inflation models, violating the standard consistency relation.
Journal ArticleDOI
Higgs G inflation
TL;DR: In this paper, a new class of inflation models within the context of G inflation is proposed, in which the standard model Higgs boson can act as an inflaton thanks to Galileon-like nonlinear derivative interaction.
Journal ArticleDOI
Generalized G-inflation: Inflation with the most general second-order field equations
TL;DR: In this paper, the generalized G-inflation model was proposed, which is a generalization of the generalized Galileon model, and the most general single-field inflation model ever.
Journal ArticleDOI
Conformal-Frame (In)dependence of Cosmological Observations in Scalar-Tensor Theory
Takeshi Chiba,Masahide Yamaguchi +1 more
TL;DR: In this paper, the correspondence between the variables in the Jordan frame and those in the Einstein frame in scalar-tensor gravity and consider the frame-in-dependence of the cosmological observables is provided.