Evolutionary behaviour of cosmological parameters with dynamical system analysis in f(Q, T) gravity
Abstract We have investigated the accelerating behaviour of the Universe in f(Q, T) gravity in an isotropic and homogeneous space-time. We have initially derive the dynamical parameters in the general form of $$f(Q,T)=\alpha Q^m+\beta T$$ f ( Q , T ) = α Q m + β T (Xu et al. in Eur Phys J C 79:708,...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-05-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-023-11598-5 |
| _version_ | 1797789620049543168 |
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| author | Laxmipriya Pati S. A. Narawade S. K. Tripathy B. Mishra |
| author_facet | Laxmipriya Pati S. A. Narawade S. K. Tripathy B. Mishra |
| author_sort | Laxmipriya Pati |
| collection | DOAJ |
| description | Abstract We have investigated the accelerating behaviour of the Universe in f(Q, T) gravity in an isotropic and homogeneous space-time. We have initially derive the dynamical parameters in the general form of $$f(Q,T)=\alpha Q^m+\beta T$$ f ( Q , T ) = α Q m + β T (Xu et al. in Eur Phys J C 79:708, 2019) and then split it into two cases (i) one with $$m=1$$ m = 1 and the (ii) other with $$\beta =0$$ β = 0 . In the first case, it reduces to the linear form of the functional f(Q, T) and second case leads to the higher power of the nonmetricity Q. In an assumed form of the hyperbolic scale factor, the models are constructed and its evolutionary behaviours are studied. The geometrical parameters as well the equation of state parameter are obtained and found to be in the preferred range of the cosmological observations. Marginal variation has been noticed in the behaviour of $$\omega $$ ω and $$\omega _{eff}$$ ω eff at present time. The violation of strong energy conditions in both the cases are shown. The dynamical system analysis for the models has been performed. |
| first_indexed | 2024-03-13T01:53:15Z |
| format | Article |
| id | doaj.art-2f4d546d8b10465da6a3e633a6093645 |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-03-13T01:53:15Z |
| publishDate | 2023-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-2f4d546d8b10465da6a3e633a60936452023-07-02T11:24:18ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522023-05-0183511310.1140/epjc/s10052-023-11598-5Evolutionary behaviour of cosmological parameters with dynamical system analysis in f(Q, T) gravityLaxmipriya Pati0S. A. Narawade1S. K. Tripathy2B. Mishra3Department of Mathematics, Birla Institute of Technology and Science-PilaniDepartment of Mathematics, Birla Institute of Technology and Science-PilaniDepartment of Physics, Indira Gandhi Institute of Technology, SarangDepartment of Mathematics, Birla Institute of Technology and Science-PilaniAbstract We have investigated the accelerating behaviour of the Universe in f(Q, T) gravity in an isotropic and homogeneous space-time. We have initially derive the dynamical parameters in the general form of $$f(Q,T)=\alpha Q^m+\beta T$$ f ( Q , T ) = α Q m + β T (Xu et al. in Eur Phys J C 79:708, 2019) and then split it into two cases (i) one with $$m=1$$ m = 1 and the (ii) other with $$\beta =0$$ β = 0 . In the first case, it reduces to the linear form of the functional f(Q, T) and second case leads to the higher power of the nonmetricity Q. In an assumed form of the hyperbolic scale factor, the models are constructed and its evolutionary behaviours are studied. The geometrical parameters as well the equation of state parameter are obtained and found to be in the preferred range of the cosmological observations. Marginal variation has been noticed in the behaviour of $$\omega $$ ω and $$\omega _{eff}$$ ω eff at present time. The violation of strong energy conditions in both the cases are shown. The dynamical system analysis for the models has been performed.https://doi.org/10.1140/epjc/s10052-023-11598-5 |
| spellingShingle | Laxmipriya Pati S. A. Narawade S. K. Tripathy B. Mishra Evolutionary behaviour of cosmological parameters with dynamical system analysis in f(Q, T) gravity European Physical Journal C: Particles and Fields |
| title | Evolutionary behaviour of cosmological parameters with dynamical system analysis in f(Q, T) gravity |
| title_full | Evolutionary behaviour of cosmological parameters with dynamical system analysis in f(Q, T) gravity |
| title_fullStr | Evolutionary behaviour of cosmological parameters with dynamical system analysis in f(Q, T) gravity |
| title_full_unstemmed | Evolutionary behaviour of cosmological parameters with dynamical system analysis in f(Q, T) gravity |
| title_short | Evolutionary behaviour of cosmological parameters with dynamical system analysis in f(Q, T) gravity |
| title_sort | evolutionary behaviour of cosmological parameters with dynamical system analysis in f q t gravity |
| url | https://doi.org/10.1140/epjc/s10052-023-11598-5 |
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