90 citations · 140 across the 5 of their papers we have counts for
4 papers · 1 filter
Metric-affine Gravity and Inflation
Keigo Shimada, Katsuki Aoki, Kei-ichi Maeda
We classify the metric-affine theories of gravitation, in which the metric and the connections are treated as independent variables, by use of several constraints on the connection…
Phenomenology in type-I minimally modified gravity
Katsuki Aoki, Antonio De Felice, Chunshan Lin +2
We study cosmology in a class of minimally modified gravity (MMG) with two local gravitational degrees of freedom. We classify modified gravity theories into type-I and type-II: th…
Galileon and generalized Galileon with projective invariance in a metric-affine formalism
Katsuki Aoki, Keigo Shimada
We study scalar-tensor theories respecting the projective invariance in the metric-affine formalism. The metric-affine formalism is a formulation of gravitational theories such tha…
Novel matter coupling in general relativity via canonical transformation
Katsuki Aoki, Chunshan Lin, Shinji Mukohyama
We study canonical transformations of general relativity (GR) to provide a novel matter coupling to gravity. Although the transformed theory is equivalent to GR in vacuum, the equi…