2007/11/05 by Kirill Krasnov, KIRILL KRASNOV · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #astro-ph #gr-qc #hep-th
paper · pdf · doi:10.1142/s021773230702590x
published as Mod.Phys.Lett.A22:3013-3026,2007 · 13 pages, no figures, invited brief review for MPLA
arxiv created 2007/11/05 · openalex publication_date 2007/12/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We review the status of a certain (infinite) class of four-dimensional generally covariant gravity theories propagating two degrees of freedom that are formulated without any direct mention of the metric. General relativity itself (in its Plebański 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.