de Sitter attractors in generalized gravity

Details de Sitter attractors in generalized gravity de Sitter attractors in generalized gravity

2004-07-06

arxiv.org/abs/gr-qc/0407021v1

Phys.Rev. D70 (2004) 044037

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

39 pages, LaTeX, to appear in Physical Review D

Scientific paper

10.1103/PhysRevD.70.044037

We obtain conditions for the existence and stability of de Sitter attractors in the phase space of spatially homogeneous and isotropic cosmology in generalized theories of gravity (including non-linear and scalar-tensor theories). These conditions are valid for any form of the coupling functions of the theory. Stability with respect to inhomogeneous perturbations is analyzed using a covariant and gauge-invariant formalism. The relevance for inflationary scenarios of the early universe and for quintessence models of the present era is discussed.

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