Quintessential Adjustment of the Cosmological Constant

2000/03/31 by A. Hebecker, Arthur Hebecker, C. Wetterich · 63 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Classical mechanics #Constant (computer programming) #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Dark energy #Energy density #Field (mathematics) #Galaxies: Formation, Evolution, Phenomena #Lambda-CDM model #Mathematical physics #Physics #Quantum mechanics #Quintessence #Theoretical physics #Universe #Vacuum energy #astro-ph #gr-qc #hep-ph

paper · pdf · doi:10.1103/physrevlett.85.3339

published in Physical Review Letters 85(16), 3339-3342 (American Physical Society) · reference added

arxiv created 2000/03/31 · openalex publication_date 2000/10/16 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We construct a time dependent adjustment mechanism for the cosmological "constant" which could be at work in a late Friedmann-Robertson-Walker universe dominated by quintessence and matter. It makes use of a Brans-Dicke field that couples to the evolving standard-model vacuum energy density. Our explicit model possesses a stable late-time solution with a fixed ratio of matter and field energy densities. No fine-tuning of model parameters or initial conditions is required.

Citations

• Measurements of Ω and Λ from 42 High‐Redshift Supernovae
• Phenomenology of a Realistic Accelerating Universe Using Only Planck-Scale Physics
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• A small cosmological constant from a large extra dimension
• Cosmological consequences of a rolling homogeneous scalar field

Cited by

• Natural quintessence?
• Coupled dark energy: a dynamical analysis with complex scalar field