Search Results - "Odintsov, Sergei D."

Modified cosmology from extended entropy with varying exponent by Nojiri, Shin’ichi, Odintsov, Sergei D., Saridakis, Emmanuel N.

“…We present a modified cosmological scenario that arises from the application of non-extensive thermodynamics with varying exponent. We extract the modified…”
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Maximal neutron star mass and the resolution of the hyperon puzzle in modified gravity by Astashenok, Artyom V., Capozziello, Salvatore, Odintsov, Sergei D.

“…The so-called "hyperon puzzle" in the theory of neutron stars is considered in the framework of modified [functionof](R) gravity. We show that for simple…”
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Different Faces of Generalized Holographic Dark Energy by Nojiri, Shin’ichi, Odintsov, Sergei, Paul, Tanmoy

“…In the formalism of generalized holographic dark energy (HDE), the holographic cut-off is generalized to depend upon LIR=LIRLp,L˙p,L¨p,⋯,Lf,L˙f,⋯,a with Lp and…”
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Inflationary Cosmology in Modified Gravity Theories by Bamba, Kazuharu, Odintsov, Sergei D

“…We review inflationary cosmology in modified gravity such as R2 gravity with its extensions in order to generalize the Starobinsky inflation model. In…”
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Conformal symmetry and accelerating cosmology in teleparallel gravity by Bamba, Kazuharu, Odintsov, Sergei D., Sáez-Gómez, Diego

“…We discuss conformal issues of pure and extended teleparallel gravity. In particular, we present formulations of conformal transformation in teleparallel…”
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Finite-time future singularities in modified Gauss–Bonnet and ℱ(R,G) gravity and singularity avoidance by Bamba, Kazuharu, Odintsov, Sergei D., Sebastiani, Lorenzo, Zerbini, Sergio

“…We study all four types of finite-time future singularities emerging in the late-time accelerating (effective quintessence/phantom) era from ℱ( R , G…”
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Recent Advances in Inflation by Odintsov, Sergei D., Oikonomou, Vasilis K., Giannakoudi, Ifigeneia, Fronimos, Fotis P., Lymperiadou, Eirini C.

“…We review recent trends in inflationary dynamics in the context of viable modified gravity theories. After providing a general overview of the inflationary…”
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Is exponential gravity a viable description for the whole cosmological history? by Odintsov, Sergei D., Sáez-Chillón Gómez, Diego, Sharov, German S.

“…Here we analyse a particular type of F ( R ) gravity, the so-called exponential gravity which includes an exponential function of the Ricci scalar in the…”
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Spectrum of Primordial Gravitational Waves in Modified Gravities: A Short Overview by Odintsov, Sergei, Oikonomou, Vasilis, Myrzakulov, Ratbay

“…In this work, we shall exhaustively study the effects of modified gravity on the energy spectrum of the primordial gravitational waves background. S. Weinberg…”
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Editorial for Feature Papers 2021–2022 by Odintsov, Sergei D.

“…This Special issue contains top-tier physics-related and mathematical research, among other topics, written by scholars who are well-known in their field [...]…”
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The new form of the equation of state for dark energy fluid and accelerating universe by Nojiri, Shin'ichi, Odintsov, Sergei D.

“…We suggest to generalize the dark energy equation of state (EoS) by introduction the relaxation equation for pressure which is equivalent to consideration of…”
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Editorial for Special Issue Feature Papers 2020 by Odintsov, Sergei D.

“…This issue of featured papers from 2020 is related to the study of symmetry phenomena in various different fields, but mainly in theoretical physics [...]…”
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Bounce Universe with Finite-Time Singularity by Odintsov, Sergei, Paul, Tanmoy

“…This work explains how the presence of a Type-IV singularity (a mild singularity) can influence the dynamics of a bouncing universe. In particular, we examine…”
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Phantom cosmology without Big Rip singularity by Astashenok, Artyom V., Nojiri, Shinʼichi, Odintsov, Sergei D., Yurov, Artyom V.

“…We construct phantom energy models with the equation of state parameter w which is less than −1, w<−1, but finite-time future singularity does not occur. Such…”
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Is the future universe singular: Dark matter versus modified gravity? by Nojiri, Shin'ichi, Odintsov, Sergei D.

“…The fundamental problem of the occurrence/removal of finite-time future singularity in the universe evolution for coupled Dark Energy (DE) is addressed. It is…”
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Obituary for Prof. Dr. Steven Weinberg by Odintsov, Sergei D.

“…With deep sadness, we announce that on 23 July 2021 our Editorial Board Member Steven Weinberg passed away [...]…”
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Accelerating cosmologies from non-local higher-derivative gravity by Capozziello, Salvatore, Elizalde, Emilio, Nojiri, Shin'ichi, Odintsov, Sergei D.

“…We study accelerating cosmological solutions of a general class of non-linear gravities which depend on Gauss–Bonnet and other higher derivative invariants. To…”
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Towards Modelling Mechanical Shaking Using Potential Energy Surfaces: A Toy Model Analysis by Odintsov, Sergei D., Oikonomou, Vasilis K.

“…In this work, we formalize the effect of mechanical shaking by using various forms of an externally exerted force, which may be constant or may be…”
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The oscillating dark energy: future singularity and coincidence problem by Nojiri, Shin'ichi, Odintsov, Sergei D.

“…We consider the oscillating dark energy with periodic equation of state in two equivalent formulations: ideal fluid or scalar–tensor theory. It is shown that…”
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Screening of cosmological constant in non-local gravity by Nojiri, Shin'ichi, Odintsov, Sergei D., Sasaki, Misao, Zhang, Ying-li

“…We discuss a possible mechanism to screen a cosmological constant in non-local gravity. We find that in a simple model of non-local gravity with the Lagrangian…”
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