Mimetic gravity is a Weyl‐symmetric extension of General Relativity, related to the latter by a
singular disformal transformation, wherein the appearance of a dust‐like perfect fluid can …

We provide a compact review on recent developments on axion F (R) gravity. The axion field
is a string-theory–originated theoretical particle that is a perfect candidate for low-mass …

In this paper we shall consider an axionic Chern-Simons-corrected f (R) gravity theoretical
framework, and we shall study the chirality of the generated primordial gravitational waves …

It is quite well known that string-inspired axionic terms of the form ν (ϕ) R˜ R, known also as
Chern-Simons terms, do not affect the scalar perturbations and the background evolution for …

We consider an extension of standard General Relativity in which the Hilbert–Einstein action
is replaced by an arbitrary function of the Ricci scalar, nonmetricity, torsion, and the trace of …

In this paper we shall investigate the propagation of gravitational waves in a flat Friedman-
Robertson-Walker background, in the context of a string motivated corrected Einstein gravity …

We propose a cosmological scenario in which the universe undergoes through a non-
singular bounce, and after the bounce, it decelerates having a matter-like dominated …

We reconsider the recently proposed mimetic gravity, focusing in particular on whether the
theory is able to reproduce the inferred flat rotation curves of galaxies. We extend the theory …

In this paper we shall study the evolution of cosmological gravitational waves in the context
of Chern–Simons axion F (R) gravity. In the case of Chern–Simons axion F (R) gravity there …

We generalize and unify the f R, T and f R, L m type gravity models by assuming that the
gravitational Lagrangian is given by an arbitrary function of the Ricci scalar R, of the trace of …