Stiff Fluid in Accelerated Universes with Torsion
Електронний архів E-archive DonNTU – (Electronic archive Donetsk National Technical University)
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Stiff Fluid in Accelerated Universes with Torsion
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| Creator |
Galiakhmetov, A. M.
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| Subject |
stiff fluid
nonminimally coupled material Friedmann universes filled Einstein-Cartan theory |
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| Description |
The flat Friedmann universes filled by stiff fluid and a nonminimally coupled material scalar field with polynomial potentials of the fourth degree are considered in the framework of the Einstein-Cartan theory. Exact general solution is obtained for arbitrary positive values of the coupling constant . A comparative analysis of the cosmological models with and without stiff fluid is carried out. Some effects of stiff fluid are elucidated. It is shown that singular models with a de Sitter asymptotic and with the power-law (t^4/3) asymptotic at late times are possible. It is found that ξ= 3/8 is a specific value of the coupling constant. It is demonstrated that the bouncing models without the particle horizon and with an accelerated expansion by a de Sitter law of an evolution at late times are admissible. The flat Friedmann universes filled by stiff fluid and a nonminimally coupled material scalar field with polynomial potentials of the fourth degree are considered in the framework of the Einstein-Cartan theory. Exact general solution is obtained for arbitrary positive values of the coupling constant . A comparative analysis of the cosmological models with and without stiff fluid is carried out. Some effects of stiff fluid are elucidated. It is shown that singular models with a de Sitter asymptotic and with the power-law (t^4/3) asymptotic at late times are possible. It is found that ξ= 3/8 is a specific value of the coupling constant. It is demonstrated that the bouncing models without the particle horizon and with an accelerated expansion by a de Sitter law of an evolution at late times are admissible. |
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| Date |
2013-12-30T06:08:21Z
2013-12-30T06:08:21Z 2013 |
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| Type |
Article
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| Identifier |
A. M. Galiakhmetov. Stiff Fluid in Accelerated Universes with Torsion //Journal of Gravity, Vol. 2013, Arti-cle ID 306417, 10 pages http://dx.doi.org/10.1155/2013/306417
http://ea.donntu.edu.ua/handle/123456789/24418 |
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| Language |
en
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| Publisher |
Hindawi Publishing Corporation
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