Quintessence and the cosmological constant

Abstract

Quintessence -- the energy density of a slowly evolving scalar field -- may constitute a dynamical form of the homogeneous dark energy in the universe. We review the basic idea in the light of the cosmological constant problem. Cosmological observations or a time variation of fundamental `constants' can distinguish quintessence from a cosmological constant.

6 pages, 2 figures, contribution to Dark Matter 2002

References in corpus (6)

• Cosmology and the Fate of Dilatation Symmetry
• Further Evidence for Cosmological Evolution of the Fine Structure Constant
• Changing alpha With Time: Implications For Fifth-Force-Type Experiments And Quintessence
• Current constraints on the dark energy equation of state
• Structure Formation and the Time Dependence of Quintessence
• Quintessence-the Dark Energy in the Universe?

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• WMAPing the Universe: Supersymmetry, Dark Matter, Dark Energy, Proton Decay and Collider Physics
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• Solving the Problem of Time in General Relativity and Cosmology with Phantoms and k -- Essence
• Quantum Corrections in Quintessence Models
• Casimir Effect in the Kerr Spacetime with Quintessence
• New solutions with accelerated expansion in string theory
• Probing dark energy with the next generation X-ray surveys of galaxy clusters
• Dynamics of interacting scalar field model in the realm of chiral cosmology
• Scalar-field Pressure in Induced Gravity with Higgs Potential and Dark Matter
• Effect of quintessence dark energy on the shadow of Hayward black holes with spherical accretion
• Coupled scalar field cosmology with effects of curvature
• Addressing the $H_0$ tension through matter with pressure and no early dark energy
• Thermal Casimir effect in Kerr spacetime with quintessence and massive gravitons
• The picture of our universe: A view from modern cosmology
• Estimations of the cosmological parameters from the observational variation of the fine structure constant
• Implications upon theory discrimination of an accurate measurement of the time rate of change of the gravitational parameter and other cosmological parameters