QCD ghost f(T)-gravity model

Abstract

Within the framework of modified teleparallel gravity, we reconstruct a f(T) model corresponding to the QCD ghost dark energy scenario. For a spatially flat FRW universe containing only the pressureless matter, we obtain the time evolution of the torsion scalar T (or the Hubble parameter). Then, we calculate the effective torsion equation of state parameter of the QCD ghost f(T)-gravity model as well as the deceleration parameter of the universe. Furthermore, we fit the model parameters by using the latest observational data including SNeIa, CMB and BAO data. We also check the viability of our model using a cosmographic analysis approach. Moreover, we investigate the validity of the generalized second law (GSL) of gravitational thermodynamics for our model. Finally, we point out the growth rate of matter density perturbation. We conclude that in QCD ghost f(T)-gravity model, the universe begins a matter dominated phase and approaches a de Sitter regime at late times, as expected. Also this model is consistent with current data, passes the cosmographic test, satisfies the GSL and fits the data of the growth factor well as the LCDM model.

19 pages, 9 figures, 2 tables. arXiv admin note: substantial text overlap with arXiv:1111.7269

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Cited by in corpus (26)

• f(T) teleparallel gravity and cosmology
• Good and bad tetrads in f(T) gravity
• Solar system constraints on f(T) gravity
• New observational constraints on f(T) gravity from cosmic chronometers
• Phase Portraits of general f(T) Cosmology
• Junction conditions in extended Teleparallel gravities
• Generalized Noether symmetry in f(T) gravity
• Generalized teleparallel cosmology and initial singularity crossing
• Warm Intermediate Inflation in $F(T)$ Gravity
• Teleparallel dark energy model with a fermionic field via Noether symmetry
• Reconstruction of $f(T)$-gravity in the absence of matter
• Analytic rotating black hole solutions in $N$-dimensional $f(T)$ gravity
• Generalized second law of thermodynamics in scalar-tensor gravity
• Power-law and intermediate inflationary models in f(T)-gravity
• Logamediate Inflation in f(T) Teleparallel Gravity
• Cosmological reconstructed solutions in extended teleparallel gravity theories with a teleparallel Gauss-Bonnet term
• Interacting viscous ghost tachyon, K-essence and dilaton scalar field models of dark energy
• Spherical collapse model and cluster number counts in power law $f(T)$ gravity
• Reconstructing QCD ghost $f(R,T)$ models
• QCD modified ghost scalar field dark energy models
• Evaporation phenomena in f(T) gravity
• Coincidence Problem in f(T) Gravity Models
• Gauss Bonnet dark energy Chaplygin Gas Model
• Cosmological Study of Autonomous Dynamical Systems in Modified Tele-Parallel Gravity
• Generalized second law of thermodynamics in massive gravity
• Revisited apparent horizon entropy and GSL in modified gravity