https://doi.org/10.1140/epjc/s10052-015-3749-2
Regular Article - Theoretical Physics
Spin connection and renormalization of teleparallel action
Instituto de Física Teórica, Universidade Estadual Paulista, R. Dr. Bento Teobaldo Ferraz 271, 01140-070, São Paulo, SP, Brazil
* e-mail: krssak@ift.unesp.br
Received:
7
October
2015
Accepted:
20
October
2015
Published online:
31
October
2015
In general relativity, inertia and gravitation are both included in the Levi–Civita connection. As a consequence, the gravitational action, as well as the corresponding energy–momentum density, are in general contaminated by spurious contributions coming from inertial effects. In teleparallel gravity, on the other hand, because the spin connection represents inertial effects only, it is possible to separate inertia from gravitation. Relying on this property, it is shown that to each tetrad there is naturally associated a spin connection that locally removes the inertial effects from the action. The use of the appropriate spin connection can be viewed as a renormalization process in the sense that the computation of energy and momentum naturally yields the physically relevant values. A self-consistent method for solving field equations and determining the appropriate spin connection is presented.
© SIF and Springer-Verlag Berlin Heidelberg, 2015
