Study of Homogeneous and Isotropic Universe in f(R,Tφ) Gravity
This paper is devoted to study the cosmological behavior of homogeneous and isotropic universe model in the context of f(R,Tφ) gravity, where φ is the scalar field. For this purpose, we follow the first-order formalism defined by H=W(φ). We evaluate Hubble parameter, effective equation of state para...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in High Energy Physics |
| Online Access: | http://dx.doi.org/10.1155/2018/9534279 |
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| _version_ | 1850178376710488064 |
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| author | M. Sharif Aisha Siddiqa |
| author_facet | M. Sharif Aisha Siddiqa |
| author_sort | M. Sharif |
| collection | DOAJ |
| description | This paper is devoted to study the cosmological behavior of homogeneous and isotropic universe model in the context of f(R,Tφ) gravity, where φ is the scalar field. For this purpose, we follow the first-order formalism defined by H=W(φ). We evaluate Hubble parameter, effective equation of state parameter (ωeff), deceleration parameter, and potential of scalar field for three different values of W(φ). We obtain phantom era in some cases for the early times. It is found that exponential expression of W(φ) yields ωeff independent of time for flat universe and independent of model parameter otherwise. It is concluded that our model corresponds to ΛCDM for both initial and late times. |
| format | Article |
| id | doaj-art-c4a615a22c0b41c5b108b118d206b6a3 |
| institution | OA Journals |
| issn | 1687-7357 1687-7365 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in High Energy Physics |
| spelling | doaj-art-c4a615a22c0b41c5b108b118d206b6a32025-08-20T02:18:46ZengWileyAdvances in High Energy Physics1687-73571687-73652018-01-01201810.1155/2018/95342799534279Study of Homogeneous and Isotropic Universe in f(R,Tφ) GravityM. Sharif0Aisha Siddiqa1Department of Mathematics, University of the Punjab, Quaid-e-Azam Campus, Lahore 54590, PakistanDepartment of Mathematics, University of the Punjab, Quaid-e-Azam Campus, Lahore 54590, PakistanThis paper is devoted to study the cosmological behavior of homogeneous and isotropic universe model in the context of f(R,Tφ) gravity, where φ is the scalar field. For this purpose, we follow the first-order formalism defined by H=W(φ). We evaluate Hubble parameter, effective equation of state parameter (ωeff), deceleration parameter, and potential of scalar field for three different values of W(φ). We obtain phantom era in some cases for the early times. It is found that exponential expression of W(φ) yields ωeff independent of time for flat universe and independent of model parameter otherwise. It is concluded that our model corresponds to ΛCDM for both initial and late times.http://dx.doi.org/10.1155/2018/9534279 |
| spellingShingle | M. Sharif Aisha Siddiqa Study of Homogeneous and Isotropic Universe in f(R,Tφ) Gravity Advances in High Energy Physics |
| title | Study of Homogeneous and Isotropic Universe in f(R,Tφ) Gravity |
| title_full | Study of Homogeneous and Isotropic Universe in f(R,Tφ) Gravity |
| title_fullStr | Study of Homogeneous and Isotropic Universe in f(R,Tφ) Gravity |
| title_full_unstemmed | Study of Homogeneous and Isotropic Universe in f(R,Tφ) Gravity |
| title_short | Study of Homogeneous and Isotropic Universe in f(R,Tφ) Gravity |
| title_sort | study of homogeneous and isotropic universe in f r tφ gravity |
| url | http://dx.doi.org/10.1155/2018/9534279 |
| work_keys_str_mv | AT msharif studyofhomogeneousandisotropicuniverseinfrtphgravity AT aishasiddiqa studyofhomogeneousandisotropicuniverseinfrtphgravity |