Natural Quintessence?

Abstract

We formulate conditions for the naturalness of cosmological quintessence scenarios. The quintessence lagrangian is taken to be the sum of a simple exponential potential and a non-canonical kinetic term. This parameterization covers most variants of quintessence and makes the naturalness conditions particularly transparent. Several ``natural'' scalar models lead, for the present cosmological era, to a large fraction of homogeneous dark energy density and an acceleration of the scale factor as suggested by observation.

11 pages LaTeX, 3 figures included, numerical correction

References in corpus (11)

• Cosmology and the Fate of Dilatation Symmetry
• Coupled Quintessence
• The Cosmic Triangle: Revealing the State of the Universe
• Quintessence arising from exponential potentials
• A New Cosmological Model of Quintessence and Dark Matter
• Quintessence and Supergravity
• Phenomenology of a realistic accelerating universe using only Planck-scale physics
• General Scalar Fields as Quintessence
• A tracker solution to the cold dark matter cosmic coincidence problem
• Quintessential Adjustment of the Cosmological Constant
• Relaxation of the cosmological constant at inflation?

Cited by in corpus (67)

• The Cosmological Constant and Dark Energy
• Cosmological implications of baryon acoustic oscillation (BAO) measurements
• Cosmic Microwave Background and Supernova Constraints on Quintessence: Concordance Regions and Target Models
• Phenomenological parameterization of quintessence
• Early Dark Energy Cosmologies
• Cuscuton Cosmology: Dark Energy meets Modified Gravity
• Quintessence and the Separation of CMB Peaks
• Variable gravity Universe
• Observational signatures of Jordan-Brans-Dicke theories of gravity
• Early Quintessence in Light of WMAP
• Probing Quintessence with Time Variation of Couplings
• Structure Formation and the Time Dependence of Quintessence
• Crossover quintessence and cosmological history of fundamental "constants"
• Binned Cosmic Microwave Background Anisotropy Power Spectra: Peak Location
• The Location of CMB Peaks in a Universe with Dark Energy
• Observing the clustering properties of galaxy clusters in dynamical dark-energy cosmologies
• Inflation, quintessence, and the origin of mass
• Impact of three years of data from the Wilkinson Microwave Anisotropy Probe on cosmological models with dynamical dark energy
• Can Structure Formation Influence the Cosmological Evolution?
• Quintessence Models and the Cosmological Evolution of alpha
• Cosmon dark matter?
• Connecting early and late universe by $f(R)$ gravity
• A Universe without expansion
• CMBEASY:: an Object Oriented Code for the Cosmic Microwave Background
• New limits on Early Dark Energy from the South Pole Telescope
• Quintessential inflation: A tale of emergent and broken symmetries
• Conformal fixed point, Cosmological Constant and Quintessence
• Naturalness of exponential cosmon potentials and the cosmological constant problem
• Quintessential perturbations during scaling regime
• Dynamical stability of K-essence field interacting non-minimally with a perfect fluid
• Constraining Quintessence with the New CMB Data
• Dark-Energy Dynamics Required to Solve the Cosmic Coincidence
• Diagnostic of Horndeski Theories
• Constraining a possible time variation of the gravitational constant G with terrestrial nuclear laboratory data
• Observational Constraints on Dynamical Dark Energy Models
• Can we test Dark Energy with Running Fundamental Constants ?
• Time variation of fundamental couplings and dynamical dark energy
• The Cosmological Constant, False Vacua, and Axions
• Quintessence and the cosmological constant
• Dynamical Stability in presence of non-minimal derivative dependent coupling of $k$-essence field with a relativistic fluid
• Ghost condensates and pure kinetic $k$-essence condensates in presence of field-fluid non-minimal coupling in the dark sector
• Coupled dark energy and dark matter from dilatation anomaly
• Traversable holographic dark energy wormholes constrained by astronomical observations
• A new pressure-parametrization unified dark fluid model
• One-loop quantum corrections to cosmological scalar field potentials
• Dark Energy, Scalar-Tensor Gravity and Large Extra Dimensions
• Axion-Dilaton Cosmology and Dark Energy
• Matter power spectra in dynamical-Dark Energy cosmologies
• Cosmological Parameter Determination from Counts of Galaxies
• Observational constraints to a phenomenological $f\left(R,\nabla R\right)$-model
• Cosmological constraints on unifying Dark Fluid models
• Knotlike Cosmic Strings in The Early Universe
• Quintessence-the Dark Energy in the Universe?
• Dark energy as a remnant of inflation and electroweak symmetry breaking
• The $k$-essence scalar field in the context of Supernova Ia Observations
• Scaling Dark Energy in a Five-Dimensional Bouncing Cosmological Model
• Interacting Models of Dark Energy and Dark Matter in Einstein scalar Gauss Bonnet Gravity
• Leptonic Dark Energy and Baryogenesis
• Freezing Out Early Dark Energy
• Time-reparametrization invariance and Hamilton-Jacobi approach to the cosmological sigma-model
• Gauge Invariant Perturbation Analysis for Quintessence with an Exponential Potential
• Cosmic scalar fields with flat potential
• A Model of Large Quintessence Isocurvature Fluctuations and Low CMB Quadrupole
• The role of potential in the ghost-condensate dark energy model
• Dark energy without fine tuning
• Cosmology in the presence of diffeomorphism-violating, nondynamical background fields
• VADER - A Satellite Mission Concept For High Precision Dark Energy Studies