Phase-space analysis of teleparallel dark energy

Abstract

We perform a detailed dynamical analysis of the teleparallel dark energy\nscenario, which is based on the teleparallel equivalent of General Relativity,\nin which one adds a canonical scalar field, allowing also for a nonminimal\ncoupling with gravity. We find that the universe can result in the\nquintessence-like, dark-energy-dominated solution, or to the stiff dark-energy\nlate-time attractor, similarly to standard quintessence. However, teleparallel\ndark energy possesses an additional late-time solution, in which dark energy\nbehaves like a cosmological constant, independently of the specific values of\nthe model parameters. Finally, during the evolution the dark energy\nequation-of-state parameter can be either above or below -1, offering a good\ndescription for its observed dynamical behavior and its stabilization close to\nthe cosmological-constant value.\n