Non-minimally Coupled Tachyon Field in Teleparallel Gravity
arXiv:1410.4446 · doi:10.1088/1475-7516/2015/04/030
Abstract
We perform a full investigation on dynamics of a new dark energy model in which the four-derivative of a non-canonical scalar field (tachyon) is non-minimally coupled to the vector torsion. Our analysis is done in the framework of teleparallel equivalent of general relativity which is based on torsion instead of curvature. We show that in our model there exists a late-time scaling attractor (point ), corresponding to an accelerating universe with the property that dark energy and dark matter densities are of the same order. Such a point can help to alleviate the cosmological coincidence problem. Existence of this point is the most significant difference between our model and another model in which a canonical scalar field (quintessence) is used instead of tachyon field.
15 pages, 6 figures
References in corpus (60)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Measurements of Omega and Lambda from 42 High-Redshift Supernovae
- Dynamics of dark energy
- The Case for a Positive Cosmological Lambda-term
- Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
- A Dynamical Solution to the Problem of a Small Cosmological Constant and Late-time Cosmic Acceleration
- Dark Energy and the Accelerating Universe
- Essentials of k-essence
- Exponential potentials and cosmological scaling solutions
- Kinetically Driven Quintessence
- Dark torsion as the cosmic speed-up
- Einstein's Other Gravity and the Acceleration of the Universe
- Late-time cosmology in (phantom) scalar-tensor theory: dark energy and the cosmic speed-up
- Quintom Cosmology: Theoretical implications and observations
- Dark Energy
- Reconstructing Dark Energy
- Quintessence: A Review
- Cosmological Evolution of the Rolling Tachyon
- Dark Matter and Dark Energy
- f(T) Gravity and local Lorentz invariance
- Cosmological scaling solutions of non-minimally coupled scalar fields
- Supersymmetric World-volume Action for Non-BPS D-branes
- Accelerating universe from F(T) gravity
- T-duality and Actions for Non-BPS D-branes
- "Teleparallel" Dark Energy
- Scalar-Tensor Gravity and Quintessence
- Inflation and quintessence with nonminimal coupling
- Assisted inflation via tachyon condensation
- Generalizations of teleparallel gravity and local Lorentz symmetry
- Torsion Gravity: a Reappraisal
- Proposal for non-BPS D-brane action
- What is needed of a tachyon if it is to be the dark energy?
- Inflation from D-\bar{D} brane annihilation
- Supersymmetry Breaking and Determination of the Unification Gauge Coupling Constant in String Theories
- Existence of relativistic stars in f(T) gravity
- Phase-Space analysis of Teleparallel Dark Energy
- Spherically symmetric static spacetimes in vacuum f(T) gravity
- Static Solutions with Spherical Symmetry in f(T) Theories
- Self-similar cosmological solutions with a non-minimally coupled scalar field
- Haloes of k-Essence
- Quintessence: a mini-review
- Observational Constraints on Teleparallel Dark Energy
- New types of gravity
- F(T) Models within Bianchi Type I Universe
- Enhancing the tensor-to-scalar ratio in simple inflation
- Does Inflationary Particle Production suggest Omega_m < 1?
- Dynamics of Teleparallel Dark Energy
- Scaling attractors in interacting teleparallel dark energy
- Tachyon inflation: tests and comparison with single scalar field inflation
- Torsion Cosmology and the Accelerating Universe
- Cosmological dynamics of tachyonic teleparallel dark energy
- Extended Quintessence with non-minimally coupled phantom scalar field
- Tachyon Field in Intermediate Inflation
- Tachyonic Teleparallel Dark Energy
- Non-minimally coupled scalar field cosmology on the phase plane
- Constraints on Dirac-Born-Infeld type dark energy models from varying alpha
- Study Of Tachyon Dynamics For Broad Classes of Potentials
- Halos of Unified Dark Matter Scalar Field
- Detectable primordial non-gaussianities and gravitational waves in k-inflation
- Lorentz Connections and Gravitation