Constant sound speed and its thermodynamical interpretation in f(Q) gravity
On the basis of homogeneous and isotropic Friedmann-Lemaitre-Robertson-Walker (FLRW) geometry, solutions to the issues of cosmic acceleration and dark energy are being put forth within the context of f(Q) gravity. We take into account a power law f(Q) model using f(Q)=αQn, where α and n are free mod...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-05-01
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| Series: | Nuclear Physics B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0550321323000871 |
| _version_ | 1797842271591202816 |
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| author | M. Koussour Simran Arora Dhruba Jyoti Gogoi M. Bennai P.K. Sahoo |
| author_facet | M. Koussour Simran Arora Dhruba Jyoti Gogoi M. Bennai P.K. Sahoo |
| author_sort | M. Koussour |
| collection | DOAJ |
| description | On the basis of homogeneous and isotropic Friedmann-Lemaitre-Robertson-Walker (FLRW) geometry, solutions to the issues of cosmic acceleration and dark energy are being put forth within the context of f(Q) gravity. We take into account a power law f(Q) model using f(Q)=αQn, where α and n are free model parameters. In the current scenario, we may establish the energy density and pressure for our f(Q) cosmic model by applying the constant sound speed parameterizations, i.e., ϑs2=β, where a barotropic cosmic fluid is described in terms of β. The field equations are then derived, and their precise solutions are established. We obtain the constraints on the model parameters using the updated Hubble (Hz) data sets consisting of 31 data points, the recently published Pantheon samples (SNe) with 1048 points, and Baryon acoustic oscillations (BAO) data sets. We also examine the physical behavior of the deceleration parameter, the equation of state (EoS) parameter, the statefinder diagnostic, and the Om diagnostic. We conclude that our f(Q) cosmic model predicts a transition in the universe from deceleration to acceleration. Further, to investigate the feasibility of the model, we discussed some of its thermodynamic aspects. |
| first_indexed | 2024-04-09T16:45:13Z |
| format | Article |
| id | doaj.art-e7c0f6110a3e4fe8aaba668a33dc2d9a |
| institution | Directory Open Access Journal |
| issn | 0550-3213 |
| language | English |
| last_indexed | 2024-04-09T16:45:13Z |
| publishDate | 2023-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Physics B |
| spelling | doaj.art-e7c0f6110a3e4fe8aaba668a33dc2d9a2023-04-23T06:05:42ZengElsevierNuclear Physics B0550-32132023-05-01990116158Constant sound speed and its thermodynamical interpretation in f(Q) gravityM. Koussour0Simran Arora1Dhruba Jyoti Gogoi2M. Bennai3P.K. Sahoo4Quantum Physics and Magnetism Team, LPMC, Faculty of Science Ben M'sik, Casablanca Hassan II University, MoroccoDepartment of Mathematics, Birla Institute of Technology and Science-Pilani, Hyderabad Campus, Hyderabad-500078, IndiaDepartment of Physics, Dibrugarh University, Dibrugarh 786004, Assam, IndiaQuantum Physics and Magnetism Team, LPMC, Faculty of Science Ben M'sik, Casablanca Hassan II University, Morocco; Lab of High Energy Physics, Modeling and Simulations, Faculty of Science, University Mohammed V-Agdal, Rabat, MoroccoDepartment of Mathematics, Birla Institute of Technology and Science-Pilani, Hyderabad Campus, Hyderabad-500078, India; Corresponding author.On the basis of homogeneous and isotropic Friedmann-Lemaitre-Robertson-Walker (FLRW) geometry, solutions to the issues of cosmic acceleration and dark energy are being put forth within the context of f(Q) gravity. We take into account a power law f(Q) model using f(Q)=αQn, where α and n are free model parameters. In the current scenario, we may establish the energy density and pressure for our f(Q) cosmic model by applying the constant sound speed parameterizations, i.e., ϑs2=β, where a barotropic cosmic fluid is described in terms of β. The field equations are then derived, and their precise solutions are established. We obtain the constraints on the model parameters using the updated Hubble (Hz) data sets consisting of 31 data points, the recently published Pantheon samples (SNe) with 1048 points, and Baryon acoustic oscillations (BAO) data sets. We also examine the physical behavior of the deceleration parameter, the equation of state (EoS) parameter, the statefinder diagnostic, and the Om diagnostic. We conclude that our f(Q) cosmic model predicts a transition in the universe from deceleration to acceleration. Further, to investigate the feasibility of the model, we discussed some of its thermodynamic aspects.http://www.sciencedirect.com/science/article/pii/S0550321323000871 |
| spellingShingle | M. Koussour Simran Arora Dhruba Jyoti Gogoi M. Bennai P.K. Sahoo Constant sound speed and its thermodynamical interpretation in f(Q) gravity Nuclear Physics B |
| title | Constant sound speed and its thermodynamical interpretation in f(Q) gravity |
| title_full | Constant sound speed and its thermodynamical interpretation in f(Q) gravity |
| title_fullStr | Constant sound speed and its thermodynamical interpretation in f(Q) gravity |
| title_full_unstemmed | Constant sound speed and its thermodynamical interpretation in f(Q) gravity |
| title_short | Constant sound speed and its thermodynamical interpretation in f(Q) gravity |
| title_sort | constant sound speed and its thermodynamical interpretation in f q gravity |
| url | http://www.sciencedirect.com/science/article/pii/S0550321323000871 |
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