Journal
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Volume -, Issue 7, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2011/07/015
Keywords
modified gravity; dark energy theory
Funding
- Ministry of Science and Technology of China [2007CB815401, 2010CB833004]
- National Natural Science Foundation of China [10935013, 11005164, 11073005]
- Distinguished Young Scholar Grant [10825313]
- CQ CSTC [2009BA4050, 2010BB0408]
- CQ MEC [KJTD201016]
- China Postdoc Grant [20100470237]
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The cosmological models based on teleparallel gravity with nonzero torsion are considered. To investigate the evolution of this theory, we consider the phase-space analysis of the f(T) theory. It shows when the tension scalar can be written as an inverse function of x where x - rho e/(3m(pl)(2)H(2)) and T - g(x), the system is an autonomous one. Furthermore, the omega(e) - omega(e)' phase analysis is given out. We perform the dynamical analysis for the models f(T) beta T ln(T/T-0) and f(T) = alpha m(pl)(2)(-T/m(pl)(2))(n) particularly. We find that the universe will settle into de-Sitter phase for both models. And we have examined the evolution behavior of the power law form in the omega(ep) - omega(ep)' plane.
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