排序方式: 共有19条查询结果,搜索用时 15 毫秒
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Shynaray Myrzakul Ratbay Myrzakulov Lorenzo Sebastiani 《Astrophysics and Space Science》2014,350(2):845-853
We consider inhomogeneous viscous fluids in flat Friedmann-Robertson-Walker universe. We analyze different kinds of such fluids and investigate the possibility to reproduce the current cosmic acceleration providing a different future evolution with respect to the Cosmological Constant case. In particular, we study the presence of finite-future time singularities. We also discuss a general class of “integrable” viscous fluid models whose bulk viscosities obey to a common differential equation. 相似文献
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F-essence is a generalization of the usual Dirac model with the nonstandard kinetic term. In this paper, we introduce a new
model of spinor cosmology containing both Ricci scalar and the non minimally coupled spinor fields in its action. We have
investigated the cosmology with both isotropy and anisotropy, where the equations of motion of FRW and Bianchi type-I spacetimes
have been derived and solved numerically. Finally the quantization of these models through Wheeler-De Witt (WD) wave function
has been discussed. 相似文献
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Koblandy Yerzhanov Kuralay Yesmakhanova Petr Tsyba Nurgissa Myrzakulov Gulgasyl Nugmanova Ratbay Myrzakulov 《Astrophysics and Space Science》2012,341(2):681-688
In the present work we analyze the g-essence model for the particular Lagrangian: . The g-essence models were proposed recently as an alternative and a generalization of the scalar k-essence models. We have presented the three types of the solutions for the g-essence model. We reconstructed the corresponding potentials and the dynamics of the scalar and fermionic fields according the evolution of the scale factor. The results show that the g-essence model predicts that our universe can be in both of the decelerated and accelerated expansion phases. In late time limit, we show that there is a family of exact solutions in which the free parameter may be remains in the range of m>−1. Further we discuss the existence of the de Sitter solutions in such a model. 相似文献
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Antonio Pasqua A. Khodam-Mohammadi Mubasher Jamil R. Myrzakulov 《Astrophysics and Space Science》2012,340(1):199-208
Motivated by the holographic principle, it has been suggested that the dark energy density may be inversely proportional to the area A of the event horizon of the universe. However, such a model would have a causality problem. In this work, we consider the entropy-corrected version of the holographic dark energy model in the non-flat FRW universe and we propose to replace the future event horizon area with the inverse of the Ricci scalar curvature. We obtain the equation of state (EoS) parameter ω Λ, the deceleration parameter q and WD¢\Omega_{D}' in the presence of interaction between Dark Energy (DE) and Dark Matter (DM). Moreover, we reconstruct the potential and the dynamics of the tachyon, K-essence, dilaton and quintessence scalar field models according to the evolutionary behavior of the interacting entropy-corrected holographic dark energy model. 相似文献
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