The Viability of Phantom Dark Energy: A Brief Review

Abstract

In this brief review, we examine the theoretical consistency and viability of phantom dark energy. Almost all data sets from cosmological probes are compatible with dark energy of the phantom variety (i.e., equation-of-state parameter $w<-1$) and may even favor evolving dark energy, and since we expect every physical entity to have some kind of field description, we set out to examine the case for phantom dark energy as a field theory. We discuss the many attempts at frameworks that may mitigate and eliminate theoretical pathologies associated with phantom dark energy. We also examine frameworks that provide an apparent measurement $w<-1$ while avoiding the need for a phantom field theory.

Invited review article for Mod. Phys. Lett. A; 13 pages; 2 minor corrections made

References in corpus (13)

• Causality, Analyticity and an IR Obstruction to UV Completion
• Tests of the Gravitational Inverse-Square Law below the Dark-Energy Length Scale
• Imperfect Dark Energy from Kinetic Gravity Braiding
• DBI and the Galileon reunited
• Bimetric gravity is cosmologically viable
• Ghosts in the self-accelerating universe
• Constructing stabilized brane world models in five-dimensional Brans-Dicke theory
• A cosmic vector for dark energy
• The null energy condition and instability
• Consistent perturbations in an imperfect fluid
• Phantom without UV pathology
• Cosmological constraints on a unified dark matter-energy scalar field model with fast transition
• A Phantom does not Result from a Backreaction

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