Mai Yashiki

activity

20182025

collaborators

4 papers

gr-qc2025

DBI scalar field cosmology in $n$ -DBI gravity

Nahomi Kan, Kiyoshi Shiraishi, Maki Takeuchi +1

We study inflationary characterictics of the universe in $n$ -DBI gravity, driven by DBI-deformed scalar fields. In this paper, we consider the evolution of the classical universe f…

astro-ph.CO2025

Toward a simultaneous resolution of the $H_{0}$ and $S_{8}$ tensions: early dark energy and an interacting dark sector model

Mai Yashiki

The tension between the Hubble constant ( $H_{0}$ ) inferred from the cosmic microwave background (CMB) and that measured from late-time observations, such as the local distance ladder…

astro-ph.CO2020

Local gravity test of unified models of inflation and dark energy in $f (R)$ gravity

Mai Yashiki, Nobuyuki Sakai, Ryo Saito

We consider $f (R)$ gravity theories which unify $R^{n}$ inflation and dark energy models. First, from the final Planck data of the cosmic microwave background, we obtain a condition,…

gr-qc2018

Classical and quantum cosmology of $K$ -essentially modified $R^{2}$ and pure $R^{p}$ gravity

Nahomi Kan, Kiyoshi Shiraishi, Mai Yashiki

We present a gravitational action with a modified higher order term of a combination of scalar curvature and Lagrangian density of a scalar field. This type of models has been cons…

DBI scalar field cosmology in n-DBI gravity

Toward a simultaneous resolution of the H0​ and S8​ tensions: early dark energy and an interacting dark sector model

Local gravity test of unified models of inflation and dark energy in f(R) gravity

Classical and quantum cosmology of K-essentially modified R2 and pure Rp gravity

DBI scalar field cosmology in $n$ -DBI gravity

Toward a simultaneous resolution of the $H_{0}$ and $S_{8}$ tensions: early dark energy and an interacting dark sector model

Local gravity test of unified models of inflation and dark energy in $f (R)$ gravity

Classical and quantum cosmology of $K$ -essentially modified $R^{2}$ and pure $R^{p}$ gravity