105 citations · 464 across the 8 of their papers we have counts for
8 papers
Anisotropic power-law k-inflation
Junko Ohashi, Jiro Soda, Shinji Tsujikawa
It is known that power-law k-inflation can be realized for the Lagrangian , where is the kinetic energy of a scalar field and is an arbitrary…
Strong Planck constraints on braneworld and non-commutative inflation
Gianluca Calcagni, Sachiko Kuroyanagi, Junko Ohashi +1
We place observational likelihood constraints on braneworld and non-commutative inflation for a number of inflaton potentials, using Planck, WMAP polarization and BAO data. Both br…
Observational signatures of anisotropic inflationary models
Junko Ohashi, Jiro Soda, Shinji Tsujikawa
We study observational signatures of two classes of anisotropic inflationary models in which an inflaton field couples to (i) a vector kinetic term F_{mu nu}F^{mu nu} and (ii) a tw…
Planck constraints on single-field inflation
Shinji Tsujikawa, Junko Ohashi, Sachiko Kuroyanagi +1
We place observational constraints on slow-variation single-field inflationary models by carrying out the cosmological Monte Carlo simulation with the recent data of Planck combine…
Anisotropic Non-Gaussianity from a Two-Form Field
Junko Ohashi, Jiro Soda, Shinji Tsujikawa
We study an inflationary scenario with a two-form field to which an inflaton couples non-trivially. First, we show that anisotropic inflation can be realized as an attractor soluti…
Potential-driven Galileon inflation
Junko Ohashi, Shinji Tsujikawa
For the models of inflation driven by the potential energy of an inflaton field , the covariant Galileon Lagrangian generally works to slow down the evolut…