Cosmological evolution of equation of state for dark energy in G-essence models

Abstract

We explore the cosmological evolution of equation of state (EoS) for dark energy in g-essence models, the action of which is described by a function of both the canonical kinetic term of both the scalar and fermionic fields. We examine g-essence models with realizing the crossing of the phantom divide line of $w_{\mathrm{DE}}=-1$ as well as the models in which the universe always stays in the non-phantom (quintessence) phase ($w_{\mathrm{DE}}>-1$). In particular, we find an explicit g-essence model with the crossing from the non-phantom phase to the phantom one ($w_{\mathrm{DE}}<-1$). This transition behavior is consistent with the recent observational data analyses.

33 pages, 21 figures, version accepted for publication in Int. J. Mod. Phys. D

References in corpus (23)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Dynamics of dark energy
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Extended Theories of Gravity
• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• Covariant Galileon
• Modified f(R) gravity consistent with realistic cosmology: from matter dominated epoch to dark energy universe
• Reconstructing Dark Energy
• Generalized Galileons: All scalar models whose curved background extensions maintain second-order field equations and stress tensors
• Reconstruction of $f(T)$ gravity: Rip cosmology, finite-time future singularities and thermodynamics
• Dark Energy and Dark Gravity
• The future evolution and finite-time singularities in $F(R)$-gravity unifying the inflation and cosmic acceleration
• Hamiltonian dynamics and Noether symmetries in Extended Gravity Cosmology
• Kinetic k-essence and Quintessence
• Attractor Solutions in f(T) Cosmology
• Constraints on a variable dark energy model with recent observations
• G-essence with Yukawa Interactions
• Ekpyrotic universes in $F(R)$ Hořava-Lifshitz gravity
• Generalized Galileon Model -- cosmological reconstruction and the Vainshtein mechanism --
• Quantum Einstein-Dirac Bianchi Universes
• Periodic Cosmological Evolutions of Equation of State for Dark Energy
• Solvable K-essence Cosmologies and Modified Chaplygin Gas Unified Models of Dark Energy and Dark Matter

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• Starobinsky model with f-essence