Search Results - "NOJIRI, S"

Modified gravity theories on a nutshell: Inflation, bounce and late-time evolution by Nojiri, S., Odintsov, S.D., Oikonomou, V.K.

“…We systematically review some standard issues and also the latest developments of modified gravity in cosmology, emphasizing on inflation, bouncing cosmology…”
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The role of energy conditions in f(R) cosmology by Capozziello, S., Nojiri, S., Odintsov, S.D.

“…Energy conditions can play an important role in defining the cosmological evolution. Specifically acceleration/deceleration of cosmic fluid, as well as the…”
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Considerations on gravitational waves in higher-order local and non-local gravity by Capozziello, S., Capriolo, M., Nojiri, S.

“…The detection of gravitational wave modes and polarizations could constitute an extremely important signature to discriminate among different theories of…”
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Integral F(R) gravity and saddle point condition as a remedy for the H0-tension by Nojiri, S., Odintsov, S.D., Oikonomou, V.K.

“…In this work, we shall provide an F(R) gravity theoretical framework for solving the H0-tension. Specifically, by exploiting the F(R) gravity correspondence…”
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Spherically symmetric black holes with electric and magnetic charge in extended gravity: physical properties, causal structure, and stability analysis in Einstein’s and Jordan’s frames by Elizalde, E., Nashed, G. G. L., Nojiri, S., Odintsov, S. D.

“…Novel static black hole solutions with electric and magnetic charges are derived for the class of modified gravities: f ( R ) = R + 2 β R , with or without a…”
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Analytic charged BHs in f(R) gravity by Nashed, G.G.L., Nojiri, S.

“…In this article, we seek exact charged spherically symmetric black holes (BHs) with considering f(R) gravitational theory. This BH is characterized by…”
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2D F(R) gravity and AdS2/CFT1correspondence by Nojiri, S., Odintsov, S. D.

“…We studied the canonical structure of 2D F(R) gravity. Its equivalence with Jackiw-Teitelboim gravity is demonstrated when no matter is present. Then, due to…”
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k-essence f(R) gravity inflation by Nojiri, S., Odintsov, S.D., Oikonomou, V.K.

“…In this work we study a modified version of f(R) gravity in which higher order kinetic terms of a scalar field are added in the action of vacuum f(R) gravity…”
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Ghost-free F(R) gravity with Lagrange multiplier constraint by Nojiri, S., Odintsov, S.D., Oikonomou, V.K.

“…We propose two new versions of ghost-free generalized F(R) gravity with Lagrange multiplier constraint. The first version of such theory for a particular…”
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Ghost-free F(R,G) gravity by Nojiri, S., Odintsov, S.D., Oikonomou, V.K., Popov, Arkady A.

“…In this work we shall address the ghost issue of F(R,G) gravity, which is known to be plagued with ghost degrees of freedom. These ghosts occur due to the…”
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Cosmological viability of f(R)-gravity as an ideal fluid and its compatibility with a matter dominated phase by Capozziello, S., Nojiri, S., Odintsov, S.D., Troisi, A.

“…We show that f(R)-gravity can, in general, give rise to cosmological viable models compatible with a matter-dominated epoch evolving into a late accelerated…”
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Unified phantom cosmology: Inflation, dark energy and dark matter under the same standard by Capozziello, S., Nojiri, S., Odintsov, S.D.

“…Phantom cosmology allows to account for dynamics and matter content of the universe tracing back the evolution to the inflationary epoch, considering the…”
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Prevalence and risk factors of zygotic splitting after 937 848 single embryo transfer cycles by Ikemoto, Y, Kuroda, K, Ochiai, A, Yamashita, S, Ikuma, S, Nojiri, S, Itakura, A, Takeda, S

“…Abstract STUDY QUESTION What is the prevalence of multiple pregnancy with zygotic splitting after single embryo transfer (SET)? SUMMARY ANSWER The prevalence…”
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Singular inflation from generalized equation of state fluids by Nojiri, S., Odintsov, S.D., Oikonomou, V.K.

“…We study models with a generalized inhomogeneous equation of state fluids, in the context of singular inflation, focusing to so-called Type IV singular…”
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Formalizing anisotropic inflation in modified gravity by Nojiri, S., Odintsov, S.D., Oikonomou, V.K., Constantini, A.

“…Motivated by the fact that the pre-inflationary era may evolve in an exotic way, in this work we formalize anisotropic evolution in the context of modified…”
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Phantom scalar dark energy as modified gravity: Understanding the origin of the Big Rip singularity by Briscese, F., Elizalde, E., Nojiri, S., Odintsov, S.D.

“…It is shown that phantom scalar models can be mapped into a mathematically equivalent, modified F(R) gravity, which turns out to be complex, in general. Only…”
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Dark energy: the equation of state description versus scalar-tensor or modified gravity by Capozziello, S., Nojiri, S., Odintsov, S.D.

“…Dark energy dynamics of the universe can be achieved by equivalent mathematical descriptions taking into account generalized fluid equations of state in…”
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Neuromelanin or DaT‐SPECT: which is the better marker for discriminating advanced Parkinson's disease? by Okuzumi, A., Hatano, T., Kamagata, K., Hori, M., Mori, A., Oji, Y., Taniguchi, D., Daida, K., Shimo, Y., Yanagisawa, N., Nojiri, S., Aoki, S., Hattori, N.

“…Background and purpose Whether the neuromelanin‐positive substantia nigra pars compacta area (NM‐SNc) on neuromelanin magnetic resonance imaging (NM‐MRI) and…”
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Black Holes with Electric and Magnetic Charges in F(R)$F(R)$ Gravity by Nashed, G. G. L., Nojiri, S.

“…We construct spherically symmetric and static solutions in F(R)$F(R)$ gravity coupled with electromagnetic fields. The solutions include new types of black…”
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Phantom and non-phantom dark energy: The cosmological relevance of non-locally corrected gravity by Jhingan, S., Nojiri, S., Odintsov, S.D., Sami, M., Thongkool, I., Zerbini, S.

“…In this Letter we have investigated the cosmological dynamics of non-locally corrected gravity involving a function of the inverse d'Alembertian of the Ricci…”
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