326 citations · 1.5k across the 52 of their papers we have counts for
6 papers · 1 filter
Non-minimal geometry-matter couplings in Weyl-Cartan space-times: gravity
Tiberiu Harko, Nurgissa Myrzakulov, Ratbay Myrzakulov +1
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 th…
Cosmological evolution and dark energy in osculating Barthel-Randers geometry
Rattanasak Hama, Tiberiu Harko, Sorin V. Sabau +1
We consider the cosmological evolution in an osculating point Barthel-Randers type geometry, in which to each point of the space-time manifold an arbitrary point vector field is as…
Cosmological implications of Rastall- theory
Shahab Shahidi
Cosmological implications of a generalized Rastall theory where the non-conservation equation is promoted to accepts arbitrary functions of the Ricci scalar is considered. We have…
Anisotropy in constraint 4D Gauss-Bonnet gravity
Shahab Shahidi, Nima Khosravi
Recently a new 4D Einstein-Gauss-Bonnet theory has been introduced \textbf{[Phys. Rev. Lett. 124 (2020) 081301]} with a serious debate that it does not possess a covariant equation…
Non-minimal Energy-momentum squared gravity
Shahab Shahidi
We consider a gravitational theory with an additional non-minimal coupling between baryonic matter fields and geometry. The coupling is second order in the energy momentum tensor a…
Geodesic deviation, Raychaudhuri equation, Newtonian limit, and tidal forces in Weyl-type gravity
Jin-Zhao Yang, Shahab Shahidi, Tiberiu Harko +1
We consider the geodesic deviation equation, describing the relative accelerations of nearby particles, and the Raychaudhuri equation, giving the evolution of the kinematical quant…