Brane f(R) gravity cosmologies

Abstract

By the application of the generalized Israel junction conditions we derive cosmological equations for the fourth-order $f(R)$ brane gravity and study their cosmological solutions. We show that there exists a non-static solution which describes a four-dimensional de-Sitter $(d{S}_4)$ brane embedded in a five-dimensional anti-de-Sitter $(Ad{S}_5)$ bulk for a vanishing Weyl tensor contribution. On the other hand, for the case of a non-vanishing Weyl tensor contribution, there exists a static brane only. We claim that in order to get some more general non-static $f(R)$ brane configurations, one needs to admit a dynamical matter energy-momentum tensor in the bulk rather than just a bulk cosmological constant.

8 pages, no figures, version to match a published paper

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Cited by in corpus (3)

• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Cosmography of f(R) - brane cosmology
• Effective cosmological equations of induced f(R) gravity