2.4k citations · 12k across the 222 of their papers we have counts for
14 papers · 1 filter
Future singularities and Teleparallelism in Loop Quantum Cosmology
Kazuharu Bamba, Jaume de Haro, Sergei D. Odintsov
We demonstrate how holonomy corrections in loop quantum cosmology (LQC) prevent the Big Rip singularity by introducing a quadratic modification in terms of the energy density i…
Spontaneous symmetry breaking in cosmos: The hybrid symmetron as a dark energy switching device
K. Bamba, R. Gannouji, M. Kamijo +2
We consider symmetron model in a generalized background with a hope to make it compatible with dark energy. We observe a "no go" theorem at least in case of a conformal coupling. B…
Generation of large-scale magnetic fields from inflation in teleparallelism
Kazuharu Bamba, Chao-Qiang Geng, Ling-Wei Luo
We explore the generation of large-scale magnetic fields from inflation in teleparallelism, in which the gravitational theory is described by the torsion scalar instead of the scal…
Cosmic history of viable exponential gravity: Equation of state oscillations and growth index from inflation to dark energy era
Kazuharu Bamba, Antonio Lopez-Revelles, R. Myrzakulov +2
A generic feature of viable gravity is investigated: It is demonstrated that during the matter dominated era the large frequency oscillations of the effective dark energy ma…
Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
Kazuharu Bamba, Salvatore Capozziello, Shin'ichi Nojiri +1
We review different dark energy cosmologies. In particular, we present the CDM cosmology, Little Rip and Pseudo-Rip universes, the phantom and quintessence cosmologies with Type…
Generalized Galileon Model -- cosmological reconstruction and the Vainshtein mechanism --
Norihito Shirai, Kazuharu Bamba, Shota Kumekawa +2
Explicit formulae of the equations in the generalized Galileon models are given. We also develop the formulation of the reconstruction. By using the formulation, we can explicitly…