Geodesic Congruences in the Palatini f(R) Theory

Details Geodesic Congruences in the Palatini f(R) Theory Geodesic Congruences in the Palatini f(R) Theory

2008-11-18

arxiv.org/abs/0811.2832v1

Phys.Rev.D78:104011,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Scientific paper

10.1103/PhysRevD.78.104011

We shall investigate the properties of a congruence of geodesics in the framework of Palatini f(R) theories. We shall evaluate the modified geodesic deviation equation and the Raychaudhuri's equation and show that f(R) Palatini theories do not necessarily lead to attractive forces. Also we shall study energy condition for f(R) Palatini gravity via a perturbative analysis of the Raychaudhuri's equation.

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