f(R) gravity with torsion: a geometric approach within the J-bundles framework

Details f(R) gravity with torsion: a geometric approach within the J-bundles framework f(R) gravity with torsion: a geometric approach within the J-bundles framework

2008-01-02

arxiv.org/abs/0801.0445v1

Int.J.Geom.Meth.Mod.Phys.05:765-788,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

17 pages

Scientific paper

10.1142/S0219887808003053

We discuss the f(R)-theories of gravity with torsion in the framework of jet-bundles. Such an approach is particularly useful since the components of the torsion and curvature tensors can be chosen as fiber jet-coordinates on the bundles and then the symmetries and the conservation laws of the theory can be easily achieved. Field equations of f(R)-gravity are studied in empty space and in presence of various forms of matter as Dirac fields, Yang--Mills fields and spin perfect fluid. Such fields enlarge the jet-bundles framework and characterize the dynamics. Finally we give some cosmological applications and discuss the relations between f(R)-gravity and scalar-tensor theories.

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