249 citations · 1.2k across the 20 of their papers we have counts for
20 papers
Inflationary universe from perfect fluid and gravity and its comparison with observational data
Kazuharu Bamba, Shin'ichi Nojiri, Sergei D. Odintsov +1
We investigate the descriptions for the observables of inflationary models, in particular, the spectral index of curvature perturbations, the tensor-to-scalar ratio, and the runnin…
Parametrizing the transition to the phantom epoch with Supernovae Ia and Standard Rulers
Iker Leanizbarrutia, Diego Sáez-Gómez
The reconstruction of a (non)canonical scalar field Lagrangian from the dark energy Equation of State (EoS) parameter is studied, where it is shown that any EoS parametrization can…
Possible antigravity regions in theory?
Kazuharu Bamba, Shin'ichi Nojiri, Sergei D. Odintsov +1
We construct an gravity theory corresponding to the Weyl invariant two scalar field theory. We investigate whether such gravity can have the antigravity regions where…
No further gravitational wave modes in gravity
Kazuharu Bamba, Salvatore Capozziello, Mariafelicia De Laurentis +2
We explore the possibility of further gravitational wave modes in gravity, where is the torsion scalar in teleparallelism. It is explicitly demonstrated that gravitation…
Conformal symmetry and accelerating cosmology in teleparallel gravity
Kazuharu Bamba, Sergei D. Odintsov, Diego Sáez-Gómez
We discuss conformal issues of pure and extended teleparallel gravity. In particular, we present formulations of conformal transformation in teleparallel gravity. Furthermore, we p…
Viable f(R) gravity and future cosmological evolution
Diego Sáez-Gómez
One of the so-called viable modified gravities is analyzed. This kind of gravity theories are characterized by a well behavior at local scales, where General Relativity is recovere…