Field Flows of Dark Energy

Abstract

Scalar field dark energy evolving from a long radiation- or matter-dominated epoch has characteristic dynamics. While slow-roll approximations are invalid, a well defined field expansion captures the key aspects of the dark energy evolution during much of the matter-dominated epoch. Since this behavior is determined, it is not faithfully represented if priors for dynamical quantities are chosen at random. We demonstrate these features for both thawing and freezing fields, and for some modified gravity models, and unify several special cases in the literature.

9 pages, 5 figures

References in corpus (11)

• Cosmology and the Fate of Dilatation Symmetry
• The Large Scale Structure of f(R) Gravity
• Measuring the dark side (with weak lensing)
• Parameterized Beyond-Einstein Growth
• Distinguishing Modified Gravity from Dark Energy
• Thawing quintessence with a nearly flat potential
• The Dynamics of Quintessence, The Quintessence of Dynamics
• The Paths of Quintessence
• Constraints on a New Post-General Relativity Cosmological Parameter
• Dynamical behavior of generic quintessence potentials: constraints on key dark energy observables
• Measuring deviations from a cosmological constant: a field-space parameterization

Cited by in corpus (23)

• Exponential Gravity
• Slow-Roll Thawing Quintessence
• Observational constraints on thawing quintessence models
• Looking Beyond Lambda with the Union Supernova Compilation
• Unified description of the dynamics of quintessential scalar fields
• Dark energy from $\alpha$-attractors: phenomenology and observational constraints
• Dark Energy Properties in DBI Theory
• DESI results: Hint towards coupled dark matter and dark energy
• Narrowing down the possible explanations of cosmic acceleration with geometric probes
• Slow-roll freezing quintessence
• Optimal parameterizations for observational constraints on thawing dark energy
• Cosmological Constant Behavior in DBI Theory
• Constraints on field flows of quintessence dark energy
• A one-parameter formula for testing slow-roll dark energy: observational prospects
• Parameterizing and Measuring Dark Energy Trajectories from Late-Inflatons
• The general property of dynamical quintessence field
• The Dark Energy Cosmic Clock: A New Way to Parametrise the Equation of State
• A new generic evolution for $k$-essence dark energy with $w\approx -1$
• Old Dark Energy
• New simple and accurate quintessence approximations
• $\Lambda$ is Coming: Parametrizing Freezing Fields
• Dark energy with $w\to -1$: Asymptotic $\Lambda$ versus pseudo-$\Lambda$
• Thawing Quintessence: Priors, evidence, and likely trajectories