Cosmology inflation in viscous mimetic f(R,T) gravity

被引:1
|
作者
Baffou, E. H. [1 ,2 ,4 ]
Houndjo, M. J. S. [1 ,2 ,4 ]
Salako, I. G. [2 ,3 ]
Gbetoho, L. D. [4 ]
机构
[1] Fac Sci & Tech Natitingou, BP 263, Natitingou, Benin
[2] Inst Math & Sci Phys, 01 BP 613, Porto Novo, Benin
[3] Univ Natl Agr, Dept Phys, 01 BP 55, Porto Novo, Benin
[4] UNSTIM, Lab Phys & Applicat LPA, Abomey, Benin
关键词
Inflation; viscous fluid; f(RT) mimetic gravity; DARK ENERGY; F R; CONSTRAINTS; MODEL; EQUATION; MATTER; (R;
D O I
10.1142/S0219887823502419
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We investigate in this work the inflationary scenario in viscous f(R, T) gravity formalism with mimetic potential and Lagrange multiplier. Considering that our universe contains beside a perfect fluid, a dark energy and a bulk viscous fluid, we obtain through the modified Friedmann equations a main differential equation that may describe the cosmological evolution in viscous mimetic f(R, T) gravity. For particular choice of the model f(R, T) = R+ alpha R-2+ ss T-gamma and for two forms of bulk viscosity coefficient, one as function of the Hubbe parameter H(t) and the other, as density-dependent viscosity, we present a numerical results of the inflationary parameters such as the tensor-to-scalar ratio r and the scalar spectral index ns. A comparison of these results with observational data shows that our model can be used to describe the accelerated expansion of the universe.
引用
收藏
页数:12
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