Stability of a Noncanonical Scalar Field Model during Cosmological Date
Using the noncanonical model of scalar field, the cosmological consequences of a pervasive, self-interacting, homogeneous, and rolling scalar field are studied. In this model, the scalar field potential is “nonlinear” and decreases in magnitude with increasing the value of the scalar field. A specia...
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doaj-5fb02b8b36dc4dbdbe82b34e417953a52020-11-24T23:06:47ZengHindawi LimitedAdvances in High Energy Physics1687-73571687-73652016-01-01201610.1155/2016/30474613047461Stability of a Noncanonical Scalar Field Model during Cosmological DateZ. Ossoulian0T. Golanbari1H. Sheikhahmadi2Kh. Saaidi3Department of Physics, Faculty of Science, University of Kurdistan, Pasdaran Street, Sanandaj 66177-15175, IranDepartment of Physics, Faculty of Science, University of Kurdistan, Pasdaran Street, Sanandaj 66177-15175, IranDepartment of Physics, Faculty of Science, University of Kurdistan, Pasdaran Street, Sanandaj 66177-15175, IranDepartment of Physics, Faculty of Science, University of Kurdistan, Pasdaran Street, Sanandaj 66177-15175, IranUsing the noncanonical model of scalar field, the cosmological consequences of a pervasive, self-interacting, homogeneous, and rolling scalar field are studied. In this model, the scalar field potential is “nonlinear” and decreases in magnitude with increasing the value of the scalar field. A special solution of the nonlinear field equations of ϕ that has time dependency as fixed point is obtained. The fixed point relies on the noncanonical term of action and γ-parameter; this parameter appeared in energy density of scalar field redshift. By means of such fixed point the different eigenvalues of the equation of motion will be obtained. In different epochs in the evolution of the Universe for different values of q and n, the potentials as a function of scalar field are attained. The behavior of baryonic perturbations in linear perturbation scenario as a considerable amount of energy density of scalar field at low redshifts prevents the growth of perturbations in the ordinary matter fluid. The energy density in the scalar field is not appreciably perturbed by nonrelativistic gravitational fields, in either the radiation or matter dominant or scalar field dominated epoch.http://dx.doi.org/10.1155/2016/3047461 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Z. Ossoulian T. Golanbari H. Sheikhahmadi Kh. Saaidi |
spellingShingle |
Z. Ossoulian T. Golanbari H. Sheikhahmadi Kh. Saaidi Stability of a Noncanonical Scalar Field Model during Cosmological Date Advances in High Energy Physics |
author_facet |
Z. Ossoulian T. Golanbari H. Sheikhahmadi Kh. Saaidi |
author_sort |
Z. Ossoulian |
title |
Stability of a Noncanonical Scalar Field Model during Cosmological Date |
title_short |
Stability of a Noncanonical Scalar Field Model during Cosmological Date |
title_full |
Stability of a Noncanonical Scalar Field Model during Cosmological Date |
title_fullStr |
Stability of a Noncanonical Scalar Field Model during Cosmological Date |
title_full_unstemmed |
Stability of a Noncanonical Scalar Field Model during Cosmological Date |
title_sort |
stability of a noncanonical scalar field model during cosmological date |
publisher |
Hindawi Limited |
series |
Advances in High Energy Physics |
issn |
1687-7357 1687-7365 |
publishDate |
2016-01-01 |
description |
Using the noncanonical model of scalar field, the cosmological consequences of a pervasive, self-interacting, homogeneous, and rolling scalar field are studied. In this model, the scalar field potential is “nonlinear” and decreases in magnitude with increasing the value of the scalar field. A special solution of the nonlinear field equations of ϕ that has time dependency as fixed point is obtained. The fixed point relies on the noncanonical term of action and γ-parameter; this parameter appeared in energy density of scalar field redshift. By means of such fixed point the different eigenvalues of the equation of motion will be obtained. In different epochs in the evolution of the Universe for different values of q and n, the potentials as a function of scalar field are attained. The behavior of baryonic perturbations in linear perturbation scenario as a considerable amount of energy density of scalar field at low redshifts prevents the growth of perturbations in the ordinary matter fluid. The energy density in the scalar field is not appreciably perturbed by nonrelativistic gravitational fields, in either the radiation or matter dominant or scalar field dominated epoch. |
url |
http://dx.doi.org/10.1155/2016/3047461 |
work_keys_str_mv |
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