期刊
CLASSICAL AND QUANTUM GRAVITY
卷 26, 期 23, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0264-9381/26/23/235020
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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-type I and V spacetimes in the framework of f (R) gravity. In particular, we find two exact solutions in each case 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 models in each case.
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