Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2011-09-28
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
14 pages, 4 tables, revtex4
Scientific paper
Recently, motivated by the similar one in the framework of General Relativity (GR), Geng et al.} proposed to allow a non-minimal coupling between quintessence and gravity in the framework of teleparallel gravity. They found that this non-minimally coupled quintessence in the framework of teleparallel gravity has a richer structure, and named it "teleparallel dark energy". In the present work, we note that there might be a deep and unknown connection between teleparallel dark energy and Elko spinor dark energy. Motivated by this observation and the previous results of Elko spinor dark energy, we try to study the dynamics of teleparallel dark energy. We find that there exist only some dark-energy-dominated de Sitter attractors. No scaling attractor has been found unfortunately. So, similar to Elko spinor dark energy, teleparallel dark energy is also plagued with the cosmological coincidence problem, although it has an extra free model parameter $\xi$.
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