249 research outputs found
Modified gravity and the stability of de Sitter space
Within the context of modified gravity and dark energy scenarios of the
accelerating universe, we study the stability of de Sitter space with respect
to inhomogeneous perturbations using a gauge-independent formalism. In modified
gravity the stability condition is exactly the same that one obtains from a
homogeneous perturbation analysis, while the stability condition in
scalar-tensor gravity is more restrictive.Comment: 5 pages, no figures, RevTeX, to appear in Phys. Rev. D (Rapid
Communications section
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