Cosmological Dynamics in Interacting Scalar-Torsion f(T,) Gravity: Investigating Energy and Momentum Couplings
arXiv:2408.14614 · doi:10.1103/PhysRevD.111.043506
Abstract
We investigate the cosmological dynamics of a homogeneous scalar field non-minimally coupled to torsion gravity, which also interacts with cold dark matter through energy and momentum transfer. The matter and radiation perfect fluids are modeled using the Sorkin-Schutz formalism. We identify scaling regimes of the field during both the radiation and matter eras. Additionally, we discovered a field-dominated scaling attractor; however, it does not exhibit accelerated expansion, making it unsuitable for describing dark energy. Nevertheless, we find two attractor solutions that do exhibit accelerated expansion: one is a quintessence-like fixed point, and the other is a de Sitter fixed point.
arXiv comment18 pages, 8 figures. Updated to match the published version in PRD
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