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Mimetic inflation confronted with Planck and BICEP2/Keck Array data
S. D. Odintsov, V. K. Oikonomou
In this paper we demonstrate that in the context of mimetic gravity with Lagrange multiplier, it is possible to realize cosmologies which are compatible with the recent BICE…
Accelerating Cosmology and Phase Structure of F(R) Gravity with Lagrange Multiplier Constraint: Mimetic Approach
S. D. Odintsov, V. K. Oikonomou
We study mimetic gravity with potential and Lagrange multiplier constraint. In the context of these theories, we introduce a reconstruction technique which enables us to rea…
Big-Bounce with Finite-time Singularity: The Gravity Description
S. D. Odintsov, V. K. Oikonomou
An alternative to the Big Bang cosmologies is obtained by the Big Bounce cosmologies. In this paper, we study a bounce cosmology with a Type IV singularity occurring at the bouncin…
Singular Inflationary Universe from Gravity
S. D. Odintsov, V. K. Oikonomou
Unlike crushing singularities, the so-called Type IV finite-time singularity offers the possibility that the Universe passes smoothly through it, without any catastrophic effects.…
Viable Mimetic Gravity Compatible with Planck Observations
S. D. Odintsov, V. K. Oikonomou
Using Mukhanov-Chamseddine mimetic approach, we study gravity with scalar potential and Lagrange multiplier constraint. As we demonstrate, for a given gravity and for…
Bounce Loop Quantum Cosmology Corrected Gauss-Bonnet Gravity
J. Haro, A. N. Makarenko, A. N. Myagky +2
We develop a Gauss-Bonnet extension of Loop Quantum Cosmology, by introducing holonomy corrections in modified theories of gravity. Within the context of our forma…
Bouncing cosmology with future singularity from modified gravity
S. D. Odintsov, V. K. Oikonomou
We investigate which Jordan frame gravity can describe a Type IV singular bouncing cosmological evolution, with special emphasis given near the point at which the Type IV si…
CDM Bounce Cosmology without CDM: the case of modified gravity
S. D. Odintsov, V. K. Oikonomou
We provide an gravity description of a CDM bouncing model, without the need for matter fluids or for cosmological constant. As we explicitly demonstrate, the two cosmolog…
Superbounce and Loop Quantum Ekpyrotic Cosmologies from Modified Gravity: , and Theories
S. D. Odintsov, V. K. Oikonomou, Emmanuel N. Saridakis
We investigate the realization of two bouncing paradigms, namely of the superbounce and the loop quantum cosmological ekpyrosis, in the framework of various modified gravities. In…