2010/10/31 by Rui Zheng, Qing-Guo Huang · 1 citation
Physics and Astronomy · #gr-qc #astro-ph.CO
paper · pdf · doi:10.1088/1475-7516/2011/03/002
published as JCAP 1103:002,2011 · 15 pages,1 figure; v2,typos corrected; v3, discussions added, accepted by JCAP
arxiv created 2011/02/23 · arxiv updated 2011/03/07
We derive the evolution equation of growth factor for the matter over-dense perturbation in f(T) gravity. For instance, we investigate its behavior in power law model at small redshift and compare it to the prediction of ΛCDM and dark energy with the same equation of state in the framework of Einstein general relativity. We find that the perturbation in f(T) gravity grows slower than that in Einstein general relativity if \p f/\p T>0 due to the effectively weakened gravity.