标题： 共形对称性和引力中的加速宇宙 显示英文标题

标题： Conformal symmetry and accelerating cosmology in teleparallel gravity

摘要： 我们讨论纯和扩展的平移引力中的共形问题。 特别是，我们给出了平移引力中共形变换的表述。 此外，我们在平移引力中提出了共形标量和规范场理论，并研究了共形扭力引力。 我们明确地展示了幂律加速（包括$\Lambda$CDM 宇宙）以及宇宙的德西特膨胀可以在具有共形标量场的扩展平移引力中实现，并且具有共形标量场的纯平移引力可以导致$\Lambda$CDM 模型。 还表明在共形扭力引力中可能存在德西特解。 显示英文摘要

摘要： 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.