Type IV singular bouncing cosmology from f(T) gravity

摘要

We investigate bouncing scenario in the modified f (T) gravity, T being the torsion scalar. Attention is attached to the reconstruction of f(T) able to describe type IV singular bouncing evolution, where we adopt as assumption that the bouncing and type IV singularity points coincide. In the context of the reconstructed f(T) model, we calculate the Hubble slow-roll parameters in order to determine the dynamical evolution of the cosmological system under study. The results show that the Hubble slow-roll parameters become singular at the type IV singularity indicating a dynamical instability. Moreover, we perform the stability analysis of the f(T) gravity solution where, according to the obtained result, the type IV singularity point is a saddle point in agreement with the bounce scenario.