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Autonomous Dynamical System Approach for Gravity
S. D. Odintsov, V. K. Oikonomou
In this work we shall investigate the cosmological dynamical system of gravity, by constructing it in such a way so that it is rendered autonomous. We shall study the vacuum…
Cosmological Bound from the Neutron Star Merger GW170817 in scalar-tensor and gravity theories
Shin'ichi Nojiri, Sergei D. Odintsov
We consider the evolution of cosmological gravitational waves in scalar-tensor theory and gravity theory as typical models of the modified gravity. Although the propagation…
Reconstruction of Slow-roll Gravity Inflation from the Observational Indices
S. D. Odintsov, V. K. Oikonomou
In this work, we introduce a bottom-up gravity reconstruction technique, in which we fix the observational indices and we seek for the gravity which may realize them.…
Is exponential gravity a viable description for the whole cosmological history?
Sergei D. Odintsov, Diego Saez-Chillon Gomez, German S. Sharov
Here we analysed a particular type of gravity, the so-called exponential gravity which includes an exponential function of the Ricci scalar in the action. Such term represen…
Regular Multi-Horizon Black Holes in Modified Gravity with Non-Linear Electrodynamics
Shin'ichi Nojiri, S. D. Odintsov
We investigated the regular multi-horizon black holes in the Einstein gravity, gravity and the 5 dimensional Gauss-Bonnet gravity, all of them coupled with non-linear electr…
An alternative attractor in gauged NJL inflation
Tomohiro Inagaki, Sergei D. Odintsov, Hiroki Sakamoto
We have investigated the attractor structure for the CMB fluctuations in composite inflation scenario within the gauged Nambu-Jona-Lasinio (NJL) model. Such composite inflation rep…