2.4k citations · 12k across the 222 of their papers we have counts for
3 papers · 2 filters
Cosmological perturbations in -essence model
Kazuharu Bamba, Jiro Matsumoto, Shin'ichi Nojiri
Subhorizon approximation is often used in cosmological perturbation theory. In this paper, however, it is shown that the subhorizon approximation is not always a good approximation…
Domain wall solution in gravity and variation of the fine structure constant
Kazuharu Bamba, Shin'ichi Nojiri, Sergei D. Odintsov
We construct a domain wall solution in gravity. We reconstruct a static domain wall solution in a scalar field theory. We also reconstruct an explicit gravity model i…
Screening of cosmological constant for De Sitter Universe in non-local gravity, phantom-divide crossing and finite-time future singularities
Kazuharu Bamba, Shin'ichi Nojiri, Sergei D. Odintsov +1
We investigate de Sitter solutions in non-local gravity as well as in non-local gravity with Lagrange constraint multiplier. We examine a condition to avoid a ghost and discuss a s…