Phantom divide crossing with non-minimal kinetic and gauss-bonnet couplings
In this paper we study a dark energy model in which tachyon scalar field non-minimally coupled with kinetic energy and Gauss-Bonnet invariant. Energy density рø, pressure рø and scalar field equation of motion have been calculated and then equation of state parameter h...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Isfahan University of Technology
2018-06-01
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| Series: | Iranian Journal of Physics Research |
| Subjects: | |
| Online Access: | http://ijpr.iut.ac.ir/browse.php?a_code=A-10-2925-2&slc_lang=en&sid=1 |
| _version_ | 1818040432503816192 |
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| author | A Banijamali R Roohollahi M vaez |
| author_facet | A Banijamali R Roohollahi M vaez |
| author_sort | A Banijamali |
| collection | DOAJ |
| description | In this paper we study a dark energy model in which tachyon scalar field non-minimally coupled with kinetic energy and Gauss-Bonnet invariant. Energy density рø, pressure рø and scalar field equation of motion have been calculated and then equation of state parameter has been extracted. We have investigated the conditions required for ω=-1 crossing in such a model. It is shown that phantom divide crossing can be realized in our model.
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| first_indexed | 2024-12-10T08:14:26Z |
| format | Article |
| id | doaj.art-1690d523ce65412887f1a911465b9964 |
| institution | Directory Open Access Journal |
| issn | 1682-6957 2345-3664 |
| language | English |
| last_indexed | 2024-12-10T08:14:26Z |
| publishDate | 2018-06-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Iranian Journal of Physics Research |
| spelling | doaj.art-1690d523ce65412887f1a911465b99642022-12-22T01:56:29ZengIsfahan University of TechnologyIranian Journal of Physics Research1682-69572345-36642018-06-01181163166Phantom divide crossing with non-minimal kinetic and gauss-bonnet couplingsA Banijamali0R Roohollahi1M vaez2 Department of Physics, Babol University of Technology, Babol Department of Physics, Babol University of Technology, Babol Department of Physics, Babol University of Technology, Babol In this paper we study a dark energy model in which tachyon scalar field non-minimally coupled with kinetic energy and Gauss-Bonnet invariant. Energy density рø, pressure рø and scalar field equation of motion have been calculated and then equation of state parameter has been extracted. We have investigated the conditions required for ω=-1 crossing in such a model. It is shown that phantom divide crossing can be realized in our model. http://ijpr.iut.ac.ir/browse.php?a_code=A-10-2925-2&slc_lang=en&sid=1Tachyon field Gauss-Bonnet cosmology Non-minimal kinetic coupling phantom |
| spellingShingle | A Banijamali R Roohollahi M vaez Phantom divide crossing with non-minimal kinetic and gauss-bonnet couplings Iranian Journal of Physics Research Tachyon field Gauss-Bonnet cosmology Non-minimal kinetic coupling phantom |
| title | Phantom divide crossing with non-minimal kinetic and gauss-bonnet couplings |
| title_full | Phantom divide crossing with non-minimal kinetic and gauss-bonnet couplings |
| title_fullStr | Phantom divide crossing with non-minimal kinetic and gauss-bonnet couplings |
| title_full_unstemmed | Phantom divide crossing with non-minimal kinetic and gauss-bonnet couplings |
| title_short | Phantom divide crossing with non-minimal kinetic and gauss-bonnet couplings |
| title_sort | phantom divide crossing with non minimal kinetic and gauss bonnet couplings |
| topic | Tachyon field Gauss-Bonnet cosmology Non-minimal kinetic coupling phantom |
| url | http://ijpr.iut.ac.ir/browse.php?a_code=A-10-2925-2&slc_lang=en&sid=1 |
| work_keys_str_mv | AT abanijamali phantomdividecrossingwithnonminimalkineticandgaussbonnetcouplings AT rroohollahi phantomdividecrossingwithnonminimalkineticandgaussbonnetcouplings AT mvaez phantomdividecrossingwithnonminimalkineticandgaussbonnetcouplings |