Dynamics of a two scalar field cosmological model with phantom terms

Abstract

We perform a detailed analysis on the dynamics of a Chiral-like cosmological model where the scalar fields can have negative kinetic terms. In particular, we study the asymptotic dynamics for the gravitational field equations for four different models in a spatially flat Friedmann--Lema\^ıtre--Robertson--Walker background space. When one of the scalar fields is phantom, we calculated that the cosmological fluid can evolves such that the parameter for the equation of state crosses twice the phantom divide line without the appearance of ghosts. Moreover, the cosmological viability of these four models is discussed.

16 pages, 11 compound figures

References in corpus (15)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Dynamics of dark energy
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Improved Cosmological Constraints from New, Old and Combined Supernova Datasets
• Covariant Galileon
• Conditions for the cosmological viability of f(R) dark energy models
• Are f(R) dark energy models cosmologically viable ?
• Reconstructing the universe history, from inflation to acceleration, with phantom and canonical scalar fields
• Quintom cosmologies with arbitrary potentials
• Dynamical behavior in mimetic F(R) gravity
• Two scalar field cosmology: Conservation laws and exact solutions
• The Evolution of Universe with th B-I Type Phantom Scalar Field
• Can Old Galaxies at High Redshifts and Baryon Acoustic Oscillations Constrain H_0?
• Dynamics of Chiral Cosmology
• Bayesian model selection on Scalar $\epsilon$-Field Dark Energy

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