Phys. Rev. D 66, 043507 (2002) [5 pages]Generalized Chaplygin gas, accelerated expansion, and dark-energy-matter unificationReceived 11 February 2002; published 14 August 2002 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 ρ and pressure p by the relationship p=-A/ρα, where A is a positive constant and 0<α<~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=αρ. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.66.043507
DOI:
10.1103/PhysRevD.66.043507
PACS:
98.80.Cq
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.