10 citations · 10 across the 1 of their papers we have counts for
3 papers
Theories with limited extrinsic curvature and a nonsingular anisotropic universe
Yuki Sakakihara, Daisuke Yoshida, Kazufumi Takahashi +1
We propose a class of theories that can limit scalars constructed from the extrinsic curvature. Applied to cosmology, this framework allows us to control not only the Hubble parame…
Accelerating Universe with a stable extra dimension in cuscuton gravity
Asuka Ito, Yuki Sakakihara, Jiro Soda
We study Kaluza-Klein cosmology in cuscuton gravity and find an exact solution describing an accelerating 4-dimensional universe with a stable extra dimension. A cuscuton which is…
Ghost-free scalar-fermion interactions
Rampei Kimura, Yuki Sakakihara, Masahide Yamaguchi
We discuss a covariant extension of interactions between scalar fields and fermions in a flat space-time. We show, in a covariant theory, how to evade fermionic ghosts appearing be…