Propagating torsion in the Einstein frame

Details Propagating torsion in the Einstein frame Propagating torsion in the Einstein frame

2006-05-10

arxiv.org/abs/gr-qc/0605061v2

J.Math.Phys. 47 (2006) 112504

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

10 pages; published version

Scientific paper

10.1063/1.2365788

The Einstein-Cartan-Saa theory of torsion modifies the spacetime volume element so that it is compatible with the connection. The condition of connection compatibility gives constraints on torsion, which are also necessary for the consistence of torsion, minimal coupling, and electromagnetic gauge invariance. To solve the problem of positivity of energy associated with the torsionic scalar, we reformulate this theory in the Einstein conformal frame. In the presence of the electromagnetic field, we obtain the Hojman-Rosenbaum-Ryan-Shepley theory of propagating torsion with a different factor in the torsionic kinetic term.

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