2003/06/08 by R. R. R. Reis, Ribamar R. R. Reis, I. Waga +4 · 1 citation
Mathematics · Physics and Astronomy · #Astrophysics #Black Holes and Theoretical Physics #Chaplygin gas #Classical mechanics #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark energy #Entropy (arrow of time) #Galaxies: Formation, Evolution, Phenomena #Geometry #Mathematics #Parameter space #Physics #Quantum mechanics #Spectral density #Statistical physics #Statistics #astro-ph
paper · pdf · doi:10.1103/physrevd.68.061302
published as Phys.Rev. D68 (2003) 061302 · references added, one figure corrected, results unchanged
arxiv created 2003/06/08 · openalex publication_date 2003/09/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We show that entropy perturbations can eliminate instabilities and oscillations in the mass power spectrum of the quartessence Chaplygin models. Our results enlarge the current parameter space of models compatible with large-scale structure and cosmic microwave background observations.