Violation of the Equivalence Principle in Modified Theories of Gravity

2006/12/31 by Gonzalo J. Olmo · 4 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #astro-ph #gr-qc #hep-th

paper · pdf · doi:10.1103/physrevlett.98.061101

published as Phys.Rev.Lett.98:061101,2007 · 4 pages, references and small comments added, to appear in Phys.Rev.Lett

arxiv created 2007/01/09 · openalex publication_date 2007/02/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We show that the metric in f(R) theories of gravity in Palatini formalism can be solved as the product of a rank-two tensor times a scalar function which is very sensitive to the local energy-momentum densities. This local dependence of the metric generates new gravitationally-induced microscopic interactions, which eventually would lead to self-accelerated test body trajectories. These facts make very unlikely the viability of Palatini f(R) models designed to change the late-time cosmic evolution.

Citations

• Equivalence Principle for Massive Bodies. II. Theory

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