paper

"Teleparallel" Dark Energy

arXiv:1109.1092 · doi:10.1016/j.physletb.2011.09.082

Abstract

Using the "teleparallel" equivalent of General Relativity as the gravitational sector, which is based on torsion instead of curvature, we add a canonical scalar field, allowing for a nonminimal coupling with gravity. Although the minimal case is completely equivalent to standard quintessence, the nonminimal scenario has a richer structure, exhibiting quintessence-like or phantom-like behavior, or experiencing the phantom-divide crossing. The richer structure is manifested in the absence of a conformal transformation to an equivalent minimally-coupled model.

5 pages, 1 figure, Version published in PLB704 (2011) 384-387

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