"Teleparallel" dark energy
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.
- Publication:
-
Physics Letters B
- Pub Date:
- October 2011
- DOI:
- 10.1016/j.physletb.2011.09.082
- arXiv:
- arXiv:1109.1092
- Bibcode:
- 2011PhLB..704..384G
- Keywords:
-
- High Energy Physics - Theory;
- Astrophysics - Cosmology and Nongalactic Astrophysics;
- General Relativity and Quantum Cosmology
- E-Print:
- 5 pages, 1 figure, Version published in PLB704 (2011) 384-387