Density Perturbation Growth in Teleparallel Cosmology
  We study the cosmological perturbations in teleparallel dark energy models in
which there is a dynamical scalar field with a non-minimal coupling to gravity.
We find that the propagating degrees of freedom are the same as in quintessence
cosmology despite that variables of the perturbed vierbein field are greater
than those in metric theories. We numerically show some evident discrepancy
from general relativity in the evolutions of the perturbations on all scales of
the universe. We also demonstrate that the gravitational interactions are
enhanced during the unique tracker evolutions in these models.
