2008/11/18 by Fatimah Shojai, Ali Shojai · 1 citation
Physics and Astronomy · #gr-qc
paper · pdf · doi:10.1103/physrevd.78.104011
published as Phys.Rev.D78:104011,2008
arxiv created 2008/11/18 · arxiv updated 2009/12/01
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.