Year: 2011
Type: article
Abstract: It is well known that f ( R ) theories are dynamically equivalent to a particular class of scalar-tensor theories. In analogy to the f ( R ) extension of the Einstein-Hilbert action of general relativity, f ( T ) theories are generalizations of the action of teleparallel gravity. The field equations are always second order, remarkably simpler than f ( R ) theories. It is interesting to investigate whether f ( T ) theories have the similar conformal features possessed in f ( R ) theories. It is shown, however, that f ( T ) theories are not dynamically equivalent to teleparallel action plus a scalar field via conformal transformation, since there appears an additional scalar-torsion coupling term. We discuss briefly what constraint of this coupling term may be put on f ( T ) theories from observations of the solar system.
Source: Europhysics Letters (EPL)
Author: Rong-Jia Yang
Institution: Hebei University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: G5425622094, G8856840598
OpenAlex ID: W2017367017