2009/10/30 by M. Sharif, M. Farasat Shamir · 1 citation
Physics and Astronomy · #gr-qc
paper · pdf · doi:10.1088/0264-9381/26/23/235020
published as Class.Quant.Grav.26:235020,2009 · 16 pages, accepted for publication in Class. Quantum Grav
arxiv created 2009/10/30 · arxiv updated 2010/05/07
In this paper, the crucial phenomenon of the expansion of the universe has been discussed. For this purpose, we study the vacuum solutions of Bianchi types I and V spacetimes in the framework of f(R) gravity. In particular, we find two exact solutions in each case by using the variation law of Hubble parameter. These solutions correspond to two models of the universe. The first solution gives a singular model while the second solution provides a non-singular model. The physical behavior of these models is discussed. Moreover, the function of the Ricci scalar is evaluated for both the models in each case.