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Inflation in $f(R,\phi)$-theories and mimetic gravity scenario

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arxiv 1504.07984 v3 pith:FHRQB3DI submitted 2015-04-29 gr-qc

R. Myrzakulov , L. Sebastiani , S. Vagnozzi This is my paper · ORCID
classification gr-qc
keywords inflationgravitycosmologicalfieldmimeticmodelstheoriesacceleration
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abstract

We investigate inflation within $f(R,\phi)$-theories, where a dynamical scalar field is coupled to gravity. A class of models which can support early-time acceleration with the emerging of an effective cosmological constant at high curvature is studied. The dynamics of the field allow for exit from inflation leading to the correct amount of inflation in agreement with cosmological data. Furthermore, the spectral index and tensor-to-scalar ratio of the models are carefully analyzed. A generalization of the theory to incorporate dark matter in the context of mimetic gravity, and further extensions of the latter, are also discussed.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Two-field mimetic gravity revisited and Hamiltonian analysis

    gr-qc 2019-09 conditional novelty 6.0 of 10

    A two-field mimetic gravity model has two scalar degrees of freedom, not one, and the extra entropy mode is a ghost when the fields have opposite-sign kinetic terms.

  2. Direct detection of solar chameleons with electron recoil data from XENONnT

    hep-ph 2025-11 conditional novelty 5.0 of 10

    XENONnT electron-recoil data bound solar chameleons to log10 β_eff < −6.9, independent of the potential index n for inverse power-law chameleons at the dark-energy scale.

  3. Large Field Polynomial Inflation in Palatini $f(R,\phi)$ Gravity

    astro-ph.CO 2024-11 conditional novelty 4.0 of 10

    Large-field polynomial inflation in Palatini f(R, phi) gravity can match Planck and BICEP/Keck data over broad parameter regions, and a negative R-squared coupling can suppress the tensor-to-scalar ratio to CMB-S4 levels.

  4. Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies

    astro-ph.CO 2022-03 accept novelty 2.0 of 10

    The paper reviews cosmological tensions including the H0 and S8 discrepancies and explores new physics models that could explain them.

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