Search Results - "Nojiri, Shin'ichi"

Covariant generalized holographic dark energy and accelerating universe by Nojiri, Shin’ichi, Odintsov, S. D.

“…We propose the generalized holographic dark energy model where the infrared cutoff is identified with the combination of the FRW universe parameters: the…”
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Unified cosmic history in modified gravity: From F ( R ) theory to Lorentz non-invariant models by Nojiri, Shin’ichi, Odintsov, Sergei D.

“…The classical generalization of general relativity is considered as the gravitational alternative for a unified description of the early-time inflation with…”
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Barrow entropic dark energy: A member of generalized holographic dark energy family by Nojiri, Shin'ichi, Odintsov, Sergei D., Paul, Tanmoy

“…The holographic cut-off, in the formalism of generalized holographic dark energy (HDE), is generalized to depend on LIR=LIR(Lp,L˙p,L¨p,⋯,Lf,L˙f,⋯,a), where Lp…”
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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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Holographic inflation by Nojiri, Shin'ichi, Odintsov, Sergei D., Saridakis, Emmanuel N.

“…We apply the holographic principle at the early universe, obtaining an inflation realization of holographic origin. Such a consideration has equal footing with…”
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Early and late universe holographic cosmology from a new generalized entropy by Nojiri, Shin'ichi, Odintsov, Sergei D., Paul, Tanmoy

“…We propose a new four-parameter entropy function that generalizes the Tsallis, Rényi, Barrow, Sharma-Mittal, Kaniadakis and Loop Quantum Gravity entropies for…”
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Propagation speed of gravitational wave in scalar–Einstein–Gauss-Bonnet gravity by Nojiri, Shin'ichi, Odintsov, Sergei D.

“…The propagation speed of the gravitational wave in scalar–Einstein–Gauss-Bonnet (sEGB) gravity is generally different from that of light. Using differential…”
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Cosmological bound from the neutron star merger GW170817 in scalar–tensor and F(R) gravity theories by Nojiri, Shin'ichi, Odintsov, Sergei D.

“…We consider the evolution of cosmological gravitational waves in scalar–tensor theory and F(R) gravity theory as typical models of the modified gravity…”
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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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Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests by Bamba, Kazuharu, Capozziello, Salvatore, Nojiri, Shin’ichi, Odintsov, Sergei D.

“…We review different dark energy cosmologies. In particular, we present the Λ CDM cosmology, Little Rip and Pseudo-Rip universes, the phantom and quintessence…”
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Towards a smooth unification from an ekpyrotic bounce to the dark energy era by Nojiri, Shin’ichi, Odintsov, Sergei D., Paul, Tanmoy

“…In the context of a ghost free f(R,G) model, we present a non-singular cosmological scenario in which the universe initially contracts through an ekpyrotic…”
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Modified cosmology from the thermodynamics of apparent horizon by Nojiri, Shin'ichi, Odintsov, Sergei D., Paul, Tanmoy

“…In the realm of the Bekenstein-Hawking entropy, the thermodynamics of apparent horizon bridges with the usual FLRW (Friedmann-Lemaître-Robertson-Walker)…”
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Gravitational waves in f(Q) non-metric gravity via geodesic deviation by Capozziello, Salvatore, Capriolo, Maurizio, Nojiri, Shin'ichi

“…We investigate gravitational waves in the f(Q) gravity, i.e., a geometric theory of gravity described by a non-metric compatible connection, free from torsion…”
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Reconstruction of f ( T ) gravity: Rip cosmology, finite-time future singularities, and thermodynamics by Bamba, Kazuharu, Myrzakulov, Ratbay, Nojiri, Shin’ichi, Odintsov, Sergei D.

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Micro-canonical and canonical description for generalised entropy by Nojiri, Shin'ichi, Odintsov, Sergei D.

“…Few parameters dependent generalised entropy includes Tsallis entropy, Rényi entropy, Sharma-Mittal entropy, Barrow entropy, Kaniadakis entropy, etc as…”
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Finite-time cosmological singularities and the possible fate of the Universe by de Haro, Jaume, Nojiri, Shin’ichi, Odintsov, S.D., Oikonomou, V.K., Pan, Supriya

“…Singularities in any physical theory are either remarkable indicators of the unknown underlying fundamental theory, or indicate a change in the description of…”
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Ghost-free F(R) bigravity and accelerating cosmology by Nojiri, Shinʼichi, Odintsov, Sergei D.

“…We propose a bigravity analogue of the F(R) gravity. Our construction is based on recent ghost-free massive bigravity where additional scalar fields are added…”
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Inflationary universe from perfect fluid and F ( R ) gravity and its comparison with observational data by Bamba, Kazuharu, Nojiri, Shin’ichi, Odintsov, Sergei D., Sáez-Gómez, Diego

“…We investigate the descriptions for the observables of inflationary models, in particular, the spectral index of curvature perturbations, the tensor-to-scalar…”
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Holographic bounce by Nojiri, Shin'ichi, Odintsov, Sergei D., Saridakis, Emmanuel N.

“…We investigate the bounce realization arising from the application of the holographic principle in the early universe, inspired by its well-studied late-time…”
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Effective F(T) gravity from the higher-dimensional Kaluza–Klein and Randall–Sundrum theories by Bamba, Kazuharu, Nojiri, Shinʼichi, Odintsov, Sergei D.

“…We explore the four-dimensional effective F(T) gravity with T the torsion scalar in teleparallelism originating from higher-dimensional space–time theories, in…”
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