Early Tracking Behavior in Small-field Quintessence Models

2003/04/01 by Wei Wang, Bo Feng
Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Constraint (computer-aided design) #Cosmology #Cosmology and Gravitation Theories #Dark energy #Geometry #Inflation (cosmology) #Inverse #Lambda #Mathematical physics #Particle physics theoretical and experimental studies #Physics #Power law #Quantum mechanics #Quintessence #Supergravity #Supersymmetry #Theoretical physics #Tracking (education) #astro-ph

paper · pdf · doi:10.1088/1009-9271/3/2/105

published as Chin.J.Astron.Astrophys.3:105-112,2003 · 11 pages,5 figures. Improved version

openalex publication_date 2003/04/01 · arxiv created 2005/08/04 · arxiv updated 2014/10/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We study several quintessence models which are singular at Q=0, and use a simple initial constraint Q_i\≥ H_inflation/2\π to see when they enter tracking regime, disregarding the details of inflation. We find it can give strong constraints for the inverse power-law potential V=V₀Q^-\α, which has to enter tracking regime for rm lnz \∼ 10. While for the supergravity model V=V₀Q^-\α rm exp(kQ²/2), the constraint is much weakened. For another kind inverse power-law potential V=V₀ rm exp(\λ/Q), it exhibits no constraints.

Citations

• Cosmology with a time-variable cosmological 'constant'
• Multiple Peaks in the Angular Power Spectrum of the Cosmic Microwave Background: Significance and Consequences for Cosmology
• Current constraints on the dark energy equation of state
• Cosmological consequences of a rolling homogeneous scalar field