POLYTROPIC AND CHAPLYGIN f(R)-GRAVITY MODELS
2012 ◽
Vol 21
(12)
◽
pp. 1250083
◽
Keyword(s):
We reconstruct different f(R)-gravity models corresponding to the polytropic, standard Chaplygin, generalized Chaplygin, modified Chaplygin and modified variable Chaplygin gas dark energy (DE) models. We also obtain the equation of state (EoS) parameters of the corresponding f(R)-gravity models which describe the accelerated expansion of the universe. We conclude that although the EoS parameters of the obtained f(R)-gravities can behave like phantom or quintessence DE models, they cannot justify the transition from the quintessence state to the phantom regime. Furthermore, the polytropic and Chaplygin f(R)-gravity models in de Sitter space can satisfy the inflation condition.
2014 ◽
Vol 29
(02)
◽
pp. 1450015
◽
2016 ◽
Vol 25
(02)
◽
pp. 1650025
◽
Keyword(s):
2008 ◽
Vol 17
(03n04)
◽
pp. 651-658
◽
2005 ◽
Vol 14
(05)
◽
pp. 883-891
◽
2012 ◽
Vol 21
(05)
◽
pp. 1250046
◽
2012 ◽
Vol 27
(18)
◽
pp. 1250100
◽
2019 ◽
Vol 28
(02)
◽
pp. 1950031
Keyword(s):