Zobrazeno 1 - 10
of 124
pro vyhledávání: '"Makarenko, P. N."'
We describe the accelerated expansion of the late-time universe using a generalized equation of state (EoS) when account is taken of bulk viscosity. We assume a homogeneous and isotropic Friedmann-Robertson-Walker spacetime. Solutions of the gravitat
Externí odkaz:
http://arxiv.org/abs/1907.02280
Publikováno v:
Int.J.Geom.Meth.Mod.Phys. 14 (2017) 1750148
We reconstruct $F(\mathcal{G})$ gravity theory with an exponential scale factor to realize the bouncing behavior in the early universe and examine the asymptotic behaviour of late-time solutions in this model. We propose an approach to the constructi
Externí odkaz:
http://arxiv.org/abs/1708.03592
Autor:
Khurshudyan, M. Zh., Makarenko, A. N.
Publikováno v:
Astrophysics and Space Science June 2016, 361:187
Subject of our study it is the accelerated expansion of the large scale universe, where a varying ghost dark energy can take the role of the dark energy. The model of the varying ghost dark energy considered in this work it is a phenomenological modi
Externí odkaz:
http://arxiv.org/abs/1606.06590
Autor:
Elizalde, Emilio, Makarenko, Andrey N.
Accelerating dynamics from Born-Infeld-$f(R)$ gravity are studied in a simplified conformal approach without matter. Explicit unification of inflation with late-time acceleration is realized within this singular inflation approach, which is similar t
Externí odkaz:
http://arxiv.org/abs/1606.05211
Publikováno v:
Phys. Rev. D 92, 124026 (2015)
We develop a Gauss-Bonnet extension of Loop Quantum Cosmology, by introducing holonomy corrections in modified $F(\mathcal{G})$ theories of gravity. Within the context of our formalism, we provide a perturbative expansion in the critical density, a p
Externí odkaz:
http://arxiv.org/abs/1506.08273
Publikováno v:
TSPU Bulletin 12 (2014) 158
We consider two types of modifications of Born-Infeld gravity in the Palatini formulation and explore their dynamics in the early universe. One of these families considers $f(R)$ corrections to the Born-Infeld Lagrangian, which can be seen as modific
Externí odkaz:
http://arxiv.org/abs/1411.6193
The solution to the current extending Universe problem, and the description of all stages of evolution compels scientists to consider various cosmological models. Scalar - tensor models are rather simple and also allow us to clearly define the separa
Externí odkaz:
http://arxiv.org/abs/1411.5445
We explore cosmology with a bounce in Gauss-Bonnet gravity where the Gauss-Bonnet invariant couples to a dynamical scalar field. In particular, the potential and and Gauss-Bonnet coupling function of the scalar field are reconstructed so that the cos
Externí odkaz:
http://arxiv.org/abs/1411.3852
Autor:
Makarenko, Andrey N.
Publikováno v:
Astrophys.Space Sci. 352 (2014) 921-924
We study accelerating dynamics from Born-Infeld-$f(R)$ gravity in a simplified conformal approach without matter. In our work (A.N. Makarenko, S. Odintsov, G.J. Olmo, Phys.Lett. B734 (2014) 36, [arXiv:1403.2850]) it was derived eventually any Dark En
Externí odkaz:
http://arxiv.org/abs/1406.1705
Publikováno v:
Phys.Lett. B734 (2014) 36-40
We study late-time cosmic accelerating dynamics from Born-Infeld-$f(R)$ gravity in a simplified conformal approach. We find that a variety of cosmic efects such as Little Rip, $\Lambda$CDM universe and dark energy cosmology with finite-time future si
Externí odkaz:
http://arxiv.org/abs/1404.2850