Cosmology in Palatini theories of gravity

Abstract

We discuss recent results on the cosmology of extended theories of gravity formulated in the Palatini approach, i.e., assuming that metric and connection are independent fields. In particular, we focus on the attempts to explain the cosmic speedup with f(R) theories and on models that avoid the big bang singularity. The field equations for gravity Lagrangians of the form f(g_{μν},{R^α}_{βμν}) (including torsion) are explicitly derived and discussed.

16 pages, no figures. Contribution to the Proceedings of Spanish Relativity Meeting ERE2011, Madrid 29 August - 2 September 2011 . Plenary talk

References in corpus (8)

• Are loop quantum cosmos never singular?
• Bouncing Cosmologies in Palatini $f(R)$ Gravity
• Anti-deSitter universe dynamics in LQC
• Viable Palatini-f(R) cosmologies with generalized dark matter
• Dynamical Aspects of Generalized Palatini Theories of Gravity
• Gödel-type universes in Palatini f(R) gravity
• Filtering out the cosmological constant in the Palatini formalism of modified gravity
• Anisotropic singularities in modified gravity models

Cited by in corpus (2)

• Field Sources for $f(R,R_{\mu \nu })$ Black-Bounce Solutions: The Case of K-Gravity
• Generalized Einstein-Maxwell field equations in the Palatini formalism