Generalized Chaplygin gas, accelerated expansion, and dark-energy-matter unification

2002/02/28 by M. C. Bento, Orfeu Bertolami, O. Bertolami +2 · 60 citations
Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Chaplygin gas #Classical mechanics #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Dark energy #Equation of state #Galaxies: Formation, Evolution, Phenomena #Homogeneity (statistics) #Mathematical physics #Physics #Quantum mechanics #Spacetime #Universe #gr-qc

paper · pdf · doi:10.1103/physrevd.66.043507

published as Phys.Rev. D66 (2002) 043507 · 5 pages, 4 figures, revtex

arxiv created 2002/04/18 · openalex publication_date 2002/08/14 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We consider the scenario emerging from the dynamics of a generalized Born-Infeld theory. The equation of state describing this system is given in terms of the energy density \ensuremathρ and pressure p by the relationship p=\ensuremath-A/\ensuremathρ^\ensuremathα, where A is a positive constant and 0<\ensuremathα<~1. We discuss the conditions under which homogeneity arises and show that this equation of state describes the evolution of a universe evolving from a phase dominated by nonrelativistic matter to a phase dominated by a cosmological constant via an intermediate period where the effective equation of state is given by p=\ensuremathα\ensuremathρ.

Citations

• A Particle Field Theorist's Lectures on Supersymmetric, Non-Abelian Fluid Mechanics and d-Branes
• Cold Dark Matter from Dark Energy
• Phenomenology of a Realistic Accelerating Universe Using Only Planck-Scale Physics
• Cosmology with a time-variable cosmological 'constant'
• Cosmic acceleration without quintessence
• Two-scalar model for a small but nonzero cosmological constant
• Time-dependent cosmological term
• Quintessence and the Rest of the World: Suppressing Long-Range Interactions
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Cosmological consequences of a rolling homogeneous scalar field

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