Matter instability in modified gravity

Details Matter instability in modified gravity Matter instability in modified gravity

2006-10-25

arxiv.org/abs/astro-ph/0610734v2

Phys.Rev.D74:104017,2006

Astronomy and Astrophysics

Astrophysics

4 pages, revtex, to appear in Phys. Rev. D. In the revised version, an error concerning the Palatini version of these theories

Scientific paper

10.1103/PhysRevD.74.104017

The Dolgov-Kawasaki instability discovered in the matter sector of the
modified gravity scenario incorporating a 1/R correction to Einstein gravity is
studied in general f(R) theories. A stability condition is found in the metric
version of these theories to help ruling out models that are unviable from the
theoretical point of view.

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