Phantom Dark Energy Models with Negative Kinetic Term

Abstract

We examine phantom dark energy models derived from a scalar field with a negative kinetic term for which V(phi) approaches infinity asymptotically. All such models can be divided into three classes, corresponding to an equation of state parameter w with asymptotic behavior w -> -1, w -> w_0 < -1, and w -> infinity. We derive the conditions on the potential V(phi) which lead to each of these three types of behavior. For models with w -> -1, we derive the conditions on V(phi) which determine whether or not such models produce a future big rip. Observational constraints are derived on two classes of these models: power-law potentials with V(phi) = lambda phi^alpha (with alpha positive or negative) and exponential potentials of the form V(phi) = beta e^{lambda phi^alpha}. It is shown that these models spend more time in a state with Omega_m ~ Omega_phi than do corresponding models with a constant value of w, thus providing a more satisfactory solution to the coincidence problem.

9 pages, 11 figures, minor clarifications added, to appear in Phys. Rev. D

References in corpus (24)

• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
• A Phantom Menace? Cosmological consequences of a dark energy component with super-negative equation of state
• Phantom Energy and Cosmic Doomsday
• Cosmological Tracking Solutions
• New Constraints on ${\Omega }_M$, ${\Omega }_{\Lambda }$, and w from an Independent Set of Eleven High-Redshift Supernovae Observed with HST
• Can the dark energy equation-of-state parameter w be less than -1?
• Properties of singularities in (phantom) dark energy universe
• Late-time cosmology in (phantom) scalar-tensor theory: dark energy and the cosmic speed-up
• The phantom menaced: constraints on low-energy effective ghosts
• The final state and thermodynamics of dark energy universe
• A classification of scalar field potentials with cosmological scaling solutions
• Cosmology with Interaction between Phantom Dark Energy and Dark Matter and the Coincidence Problem
• Phantom Field and the Fate of Universe
• Constraints on linear-negative potentials in quintessence and phantom models from recent supernova data
• The Fate of Bound Systems in Phantom and Quintessence Cosmologies
• Generalizing the generalized Chaplygin gas
• Phantom Cosmic Dynamics: Tracking Attractor and Cosmic Doomsday
• Phantom cosmology with general potentials
• Attractor Behavior of Phantom Cosmology
• Phantom Dark Energy, Cosmic Doomsday, and the Coincidence Problem
• Instabilities and the null energy condition
• The coincidence problem in linear dark energy models
• Initial conditions for quintessence after inflation
• Coincidence Problem in an Oscillating Universe

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