Violation of causality in f(R) gravity

Details Violation of causality in f(R) gravity Violation of causality in f(R) gravity

2010-07-08

arxiv.org/abs/1007.1280v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

3 pages. To appear in the Proc. of 12th Marcel Grossmann Meeting on General Relativity, Paris, 12--18 July 2009

Scientific paper

We examine the question as to whether the f(R) gravity theories, in both
metric and in Palatini formalisms, permit space-times in which the causality is
violated. We show that the field equations of these f(R) gravity theories admit
solutions with violation of causality for a physically well-motivated
perfect-fluid matter content.

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