Symmetric teleparallel geometries

In teleparallel gravity and, in particular, in F(T) teleparallel gravity, there is a challenge in determining an appropriate (co-)frame and its corresponding spin connection to describe the geometry. Very often, the 'proper' frame, the frame in which all inertial effects are absent, is not the simplest (e.g, diagonal) (co-)frame. The determination of the frame and its corresponding spin connection for F(T) teleparallel gravity theories when there exist affine symmetries is of much interest. In this paper we present the general form of the coframe and its corresponding spin connection for teleparallel geometries which are invariant under a G (6) group of affine symmetries. The proper coframe and the corresponding F(T) field equations are also shown for these teleparallel Robertson-Walker geometries. Further, with the addition of an additional affine symmetry, it is possible to define a teleparallel de Sitter geometry.

Automated summary

In F(T) teleparallel gravity, determining an appropriate frame and spin connection is a challenge. This paper presents the general form of the coframe and spin connection for teleparallel geometries invariant under affine symmetries, and provides the corresponding F(T) field equations for these geometries.