Conformal symmetry and accelerating cosmology in teleparallel gravity
  We discuss conformal issues of pure and extended teleparallel gravity. In
particular, we present formulations of conformal transformation in teleparallel
gravity. Furthermore, we propose conformal scalar and gauge field theories in
teleparallel gravity and study conformal torsion gravity. We explicitly
demonstrate that a power-law acceleration (including the $\Lambda$CDM universe)
as well as the de Sitter expansion of the universe can be realized in extended
teleparallel gravity with a conformal scalar field, and that pure teleparallel
gravity with a conformal scalar field can lead to the $\Lambda$CDM model. It is
also shown that there can exist the de Sitter solution in conformal torsion
gravity.
