The significance of matter coupling in f(R) gravity

Abstract

The way one chooses to couple gravity to matter is an essential characteristic of any gravitational theory. In theories where the gravitational field is allowed to have more degrees of freedom than those of General Relativity (e.g. scalar-tensor theory, f(R) gravity) this issue often becomes even more important. We concentrate here on f(R) gravity treated within the Palatini variational principle and discuss how the coupling between matter and the extra degrees of freedom of gravity (the independent connections in our case) affects not only the resulting phenomenology but even the geometrical meaning of fundamental fields.

arXiv commentTalk given at the 11th Marcel Grossman Meeting, Berlin, Germany, 23-29 Jul 2006

References in corpus (2)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• The metric-affine formalism of f(R) gravity

Cited by in corpus (9)

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• The viability of theories with matter coupled to the Ricci scalar
• f(R) gravity: successes and challenges
• Clifton's spherical solution in f(R) vacuo harbours a naked singularity
• Time-Dependent Scalar Fields in Modified Gravities in a Stationary Spacetime
• Horizons and singularity in Clifton's spherical solution of f(R) vacuum
• Extension of the EGS theorem to metric and Palatini f(R) gravity
• Weyl-invariant extension of the Metric-Affine Gravity