Search Results - "Oikonomou, V.K."

Swampland implications of GW170817-compatible Einstein-Gauss-Bonnet gravity by Odintsov, S.D., Oikonomou, V.K.

“…We revisit the Einstein-Gauss-Bonnet theory in view of the GW170817 event, which compels that the gravitational wave speed is equal to cT2=1 in natural units…”
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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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Non-minimal derivative coupling theories compatible with GW170817 by Oikonomou, V.K.

“…In this work we aim to revive the interest for non-minimal derivative coupling theories of gravity, in light of the GW170817 event. These theories include a…”
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Effects of a pre-inflationary de Sitter bounce on the primordial gravitational waves in f(R) gravity theories by Oikonomou, V.K.

“…In this work we examine the effects of a pre-inflationary de Sitter bounce on the energy spectrum of the primordial gravitational waves. Specifically we assume…”
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Inflationary phenomenology of Einstein Gauss-Bonnet gravity compatible with GW170817 by Odintsov, S.D., Oikonomou, V.K.

“…In this work we shall study Einstein Gauss-Bonnet theories and we investigate when these can have their gravitational wave speed equal to the speed of light,…”
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Causal limit of neutron star maximum mass in f(R) gravity in view of GW190814 by Astashenok, A.V., Capozziello, S., Odintsov, S.D., Oikonomou, V.K.

“…We investigate the causal limit of maximum mass for stars in the framework of f(R) gravity. We choose a causal equation of state, with variable speed of sound,…”
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Extended gravity description for the GW190814 supermassive neutron star by Astashenok, A.V., Capozziello, S., Odintsov, S.D., Oikonomou, V.K.

“…Very recently a compact object with a mass in the range 2.50÷2.67M⊙ has been discovered via gravitational waves detection of a compact binary coalescence. The…”
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Inflationary attractors in F(R) gravity by Odintsov, S.D., Oikonomou, V.K.

“…In this letter we shall demonstrate that the viable F(R) gravities can be classified mainly into two classes of inflationary attractors, either the R2…”
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Pre-inflationary bounce effects on primordial gravitational waves of f(R) gravity by Odintsov, S.D., Oikonomou, V.K.

“…In this work we shall study a possible pre-inflationary scenario for our Universe and how this might be realized by f(R) gravity. Specifically, we shall…”
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Dynamics of inflation and dark energy from F(R,G) gravity by Odintsov, S.D., Oikonomou, V.K., Banerjee, S.

“…In this work we study certain classes of F(R,G) gravity which have appealing phenomenological features, with respect to the successful realization of the dark…”
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The reconstruction of f(ϕ)R and mimetic gravity from viable slow-roll inflation by Odintsov, S.D., Oikonomou, V.K.

“…In this work, we extend the bottom-up reconstruction framework of F(R) gravity to other modified gravities, and in particular for f(ϕ)R and mimetic F(R)…”
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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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Early dark energy with power-law F(R) gravity by Odintsov, Sergei D., Oikonomou, V.K., Sharov, German S.

“…We study a power-law F(R) gravity with an early dark energy term, that can describe both the early-time and the late-time acceleration of the Universe. We…”
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Gauss–Bonnet gravitational baryogenesis by Odintsov, S.D., Oikonomou, V.K.

“…In this letter we study some variant forms of gravitational baryogenesis by using higher order terms containing the partial derivative of the Gauss–Bonnet…”
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Extended matter bounce scenario in ghost free f(R,G) gravity compatible with GW170817 by Elizalde, E., Odintsov, S.D., Oikonomou, V.K., Paul, Tanmoy

“…In the context of a ghost free f(R,G) model, an extended matter bounce scenario is studied where the form of the scale factor is given by a(t)=(a0t2+1)n. The…”
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Unification of constant-roll inflation and dark energy with logarithmic R2-corrected and exponential F(R) gravity by Odintsov, S.D., Oikonomou, V.K., Sebastiani, L.

“…In this paper we investigate how to describe in a unified way a constant-roll inflationary era with a dark energy era, by using the theoretical framework of…”
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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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R2 quantum corrected scalar field inflation by Oikonomou, V.K., Giannakoudi, Ifigeneia

“…String theory enjoys an elevated role among quantum gravity theories, since it seems to be the most consistent UV completion of general relativity and the…”
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Running of the spectral index and inflationary dynamics of F(R) gravity by Odintsov, S.D., Oikonomou, V.K.

“…In this work we shall provide a model-independent general calculation of the running of the spectral index for vacuum F(R) gravities. We shall exploit the…”
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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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