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General Slow-Roll Inflation in f (R) Gravity under the Palatini Approach
(Symmetry, 2020)
Slow-roll inflation is analyzed in the context of modified gravity within the Palatini
formalism. As shown in the literature, inflation in this framework requires the presence of non-traceless
matter; otherwise, it does not occur just as a consequence of the nonlinear gravitational terms of the
action. Nevertheless, by including a single scalar field that plays the role of the ...
Reconstructed f (R) Gravity and Its Cosmological Consequences in theChameleon Scalar Field with a Scale Factor Describing the Pre-Bounce Ekpyrotic Contraction
(Symmetry, 2020)
The present study reports a reconstruction scheme for f(R) gravity with the scale factor
a(t) ∝ (t∗ − t)
2
c
2 describing the pre-bounce ekpyrotic contraction, where t∗ is the big crunch time.
The reconstructed f(R) is used to derive expressions for density and pressure contributions, and the
equation of state parameter resulting from this reconstruction is found to behave ...
General Slow-Roll Inflation in f (R) Gravity under the Palatini Approach
(Symmetry, 2020)
Slow-roll inflation is analyzed in the context of modified gravity within the Palatini
formalism. As shown in the literature, inflation in this framework requires the presence of non-traceless
matter; otherwise, it does not occur just as a consequence of the nonlinear gravitational terms of the
action. Nevertheless, by including a single scalar field that plays the role of the ...
General Slow-Roll Inflation in f (R) Gravity under the Palatini Approach
(Symmetry, 2020)
Slow-roll inflation is analyzed in the context of modified gravity within the Palatini
formalism. As shown in the literature, inflation in this framework requires the presence of non-traceless
matter; otherwise, it does not occur just as a consequence of the nonlinear gravitational terms of the
action. Nevertheless, by including a single scalar field that plays the role of the ...
Reconstructed f (R) Gravity and Its Cosmological Consequences in theChameleon Scalar Field with a Scale Factor Describing the Pre-Bounce Ekpyrotic Contraction
(Symmetry, 2020)
The present study reports a reconstruction scheme for f(R) gravity with the scale factor
a(t) ∝ (t∗ − t)
2
c
2 describing the pre-bounce ekpyrotic contraction, where t∗ is the big crunch time.
The reconstructed f(R) is used to derive expressions for density and pressure contributions, and the
equation of state parameter resulting from this reconstruction is found to behave ...
General Slow-Roll Inflation in f (R) Gravity under the Palatini Approach
(Symmetry, 2020)
Slow-roll inflation is analyzed in the context of modified gravity within the Palatini
formalism. As shown in the literature, inflation in this framework requires the presence of non-traceless
matter; otherwise, it does not occur just as a consequence of the nonlinear gravitational terms of the
action. Nevertheless, by including a single scalar field that plays the role of the ...