Phys. Rev. D 70, 044037 (2004) [16 pages]de Sitter attractors in generalized gravityReceived 15 February 2004; published 25 August 2004 We obtain conditions for the existence and stability of de Sitter attractors in the phase space of homogeneous and isotropic cosmology in generalized theories of gravity (including nonlinear 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. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.70.044037
DOI:
10.1103/PhysRevD.70.044037
PACS:
04.50.+h
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