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Spinor model of a perfect fluid

100%
Saha B.
Open Physics
|
2010
|
vol. 8
|
issue 6
920-923
EN
Different characteristics of matter influencing the evolution of the uUniverse haves been simulated by means of a nonlinear spinor field. We have considered two cases where the spinor field nonlinearity occurs either as a result of self-action or due to the interaction with a scalar field.
2
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Phase space analysis of interacting dark energy in f(T) cosmology

88%
Jamil M., Yesmakhanova K., Momeni D., Myrzakulov R.
Open Physics
|
2012
|
vol. 10
|
issue 5
1065-1071
EN
In this paper, we examine the interacting dark energy model in f(T) cosmology. We assume dark energy as a perfect fluid and choose a specific cosmologically viable form f(T) = β√T. We show that there is one attractor solution to the dynamical equation of f(T) Friedmann equations. Further we investigate the stability in phase space for a general f(T) model with two interacting fluids. By studying the local stability near the critical points, we show that the critical points lie on the sheet u* = (c − 1)v* in the phase space, spanned by coordinates (u, v, Ω, T). From this critical sheet, we conclude that the coupling between the dark energy and matter c ∈ (−2, 0).
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