Teleparallel Dark Energy with Purely Non-minimal Coupling to Gravity
arXiv:1204.4048 · doi:10.1016/j.physletb.2012.11.053
Abstract
We propose the simplest model of teleparallel dark energy with purely a non-minimal coupling to gravity but no self-potential, a single model possessing various interesting features: simplicity, self-potential-free, the guaranteed late-time cosmic acceleration driven by the non-minimal coupling to gravity, tracker behavior of the dark energy equation of state at earlier times, a crossing of the phantom divide at a late time, and the existence of a finite-time future singularity. We find the analytic solutions of the dark-energy scalar field respectively in the radiation, matter, and dark energy dominated eras, thereby revealing the above features. We further illustrate possible cosmic evolution patterns and present the observational constraint of this model obtained by numerical analysis and data fitting.
12 pages, 3 figures, Title changed, Revised Version Accepted for publication in Phys. Lett. B
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- Cosmology with non-minimal derivative couplings: perturbation analysis and observational constraints
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- Teleparallel Conformal Invariant Models induced by Kaluza-Klein Reduction
- Teleparallel Gravity in Five Dimensional Theories
- Late-time power-law stages of cosmological evolution in teleparallel gravity with nonminimal coupling
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