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

• Type: Article in International Scientific Journal
• Date: 2002

Authors

Bento, MC (Author) Other; Bertolami, O (Author) Other; Sen, AA (Author) Other

Journal

Title: Physical Review D - Particles, Fields, Gravitation and Cosmology

Vol. 66

ISSN: 1550-7998

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 1725 Citations

Scopus - 1813 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-000-NBH

DOI: 10.1103/physrevd.66.043507

Abstract (EN): 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 rho and pressure p by the relationship p=-A/rho(alpha), where A is a positive constant and 0<alpha <= 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=alpha rho.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5