426 citations · 5.4k across the 194 of their papers we have counts for
10 papers · 1 filter
Oscillating phantom in gravity
Kazuharu Bamba, Chao-Qiang Geng
We investigate the oscillating effective equation of state (EoS) of the universe around the phantom divide in the framework of gravity. We illustrate the behavior of …
Equivalence of modified gravity equation to the Clausius relation
Kazuharu Bamba, Chao-Qiang Geng, Shin'ichi Nojiri +1
We explicitly show that the equations of motion for modified gravity theories of -gravity, the scalar-Gauss-Bonnet gravity, -gravity and the non-local gravity…
Equilibrium thermodynamics in modified gravitational theories
Kazuharu Bamba, Chao-Qiang Geng, Shinji Tsujikawa
We show that it is possible to obtain a picture of equilibrium thermodynamics on the apparent horizon in the expanding cosmological background for a wide class of modified gravity…
Non-degenerate Low Energy Leptogenesis
Chao-Qiang Geng, Dmitry V. Zhuridov
This paper has been withdrawn by the author due to a crucial sign error.
Neutrino Masses, Leptogenesis and Decaying Dark Matter
Chuan-Hung Chen, Chao-Qiang Geng, Dmitry V. Zhuridov
We study a simple extension of the standard model to simultaneously explain neutrino masses, dark matter and the matter-antimatter asymmetry of the Universe. In our model, the bary…
Leptogenesis in a model with Friedberg-Lee symmetry
Takeshi Araki, C. Q. Geng
We study the matter-antimatter asymmetry through the leptogenesis mechanism in a specific model with the Friedberg-Lee (FL) symmetry.We relate the leptogenesis with the CP violatin…