Non-metric gravity: A status report

Details Non-metric gravity: A status report Non-metric gravity: A status report

2007-11-05

arxiv.org/abs/0711.0697v1

Mod.Phys.Lett.A22:3013-3026,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

13 pages, no figures, invited brief review for MPLA

Scientific paper

10.1142/S021773230702590X

We review the status of a certain (infinite) class of four-dimensional generally covariant theories propagating two degrees of freedom that are formulated without any direct mention of the metric. General relativity itself (in its Plebanski formulation) belongs to the class, so these theories are examples of modified gravity. We summarize the current understanding of the nature of the modification, of the renormalizability properties of these theories, of their coupling to matter fields, and describe some of their physical properties.

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