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Power-law Gravity as Deformations to Starobinsky Inflation in View of ACT
S. D. Odintsov, V. K. Oikonomou
In this work we aim to provide a new parametrization of power-law gravity inflation framework in the Jordan frame. It is known in the literature that the power-law gr…
Confronting Rainbow-deformed Gravity with the ACT Data
S. D. Odintsov, V. K. Oikonomou
In this work we examine a theoretical scenario which combines two fundamental theoretical proposals for the early Universe and a possible evolution for the early post-inflationary…
Solving the Trans-Planckian Censorship Problem with a Power-law Tail in Inflation: A Dynamical System Approach
S. D. Odintsov, V. K. Oikonomou, Eleni I. Manouri +1
In this work we elaborate on solving the trans-Planckian censorship problem of standard slow-roll inflation by using a power-law inflationary tail generated by a scalar field with…
Strong Gravity Effects on -corrected Single Scalar Field Inflation and Compatibility with the ACT Data
V. K. Oikonomou
In this work we introduce the rescaled -corrected minimally coupled scalar field theory, a theory that contains minimal quantum corrections of the single scalar fiel…
GW170817 Viable Einstein-Gauss-Bonnet Inflation Compatible with the Atacama Cosmology Telescope Data
S. D. Odintsov, V. K. Oikonomou
In this work we investigate several Einstein-Gauss-Bonnet models that are compatible with the GW170817 event, the Atacama Cosmology Telescope data and the BICEP/Keck updated Planck…
Effective Equation of State Oscillations at Matter-Radiation Equality and Primordial Gravitational Waves
S. D. Odintsov, V. K. Oikonomou
The theory controlling the Universe's evolution in the classical regime has to be motivated by particle physics reasoning and should also generate inflation and dark energy eras in…
Phantom Crossing and Oscillating Dark Energy with Gravity
Shin'ichi Nojiri, S. D. Odintsov, V. K. Oikonomou
In this work, we shall consider how a dynamical oscillating and phantom crossing dark energy era can be realized in the context of gravity. We approach the topic from a theo…
Dynamical Dark Energy from Gravity Models Unifying Inflation with Dark Energy: Confronting the Latest Observational Data
S. D. Odintsov, V. K. Oikonomou, G. S. Sharov
A class of viable gravity models which can provide a unified description of inflation with the dark energy era is confronted with the latest observational data on the dark e…
A Power-law Inflation Tail for the Standard -Inflation and the Trans-Planckian Censorship Conjecture
S. D. Odintsov, V. K. Oikonomou
The conceptual problems of the standard slow-roll inflationary scenario include the Trans-Planckian Censorship Conjecture issue, which severely restricts the tensor-to-scalar ratio…
Einstein-Gauss-Bonnet Cosmology Confronted with Observations
S. D. Odintsov, V. K. Oikonomou, German S. Sharov
Several models within the framework of Einstein-Gauss-Bonnet gravities are considered with regard their late-time phenomenological viability. The models contain a non-minimally cou…