Study of Entropy-Corrected Models Using Dark Energy in the Framework of a Complementary Gravitational Field
- Авторлар: Aly A.1, Selim M.2
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Мекемелер:
- Physics Department, Faculty of Science
- Theoretical Research Group, Physics Department, Faculty of Science
- Шығарылым: Том 25, № 3 (2019)
- Беттер: 277-282
- Бөлім: Article
- URL: https://journals.rcsi.science/0202-2893/article/view/176356
- DOI: https://doi.org/10.1134/S0202289319030034
- ID: 176356
Дәйексөз келтіру
Аннотация
The dark energy (DE) model of a complementary gravitational field is used to address the entropy-corrected cosmological model. The dominant DE universe can originate from an indirect coupling between vacuum energy and another complementary gravitational field. This idea is used together with entropy-corrected models to study the evolution of DE in the universe. The zero point energy is calculated from one-loop corrections and used to reconstruct the scale factor and the Hubble parameter. It is then used to evaluate the equation of state (EoS) parameter for both interacting and non-interacting DE and the cosmic pressure. The square of sound speed, used to assess the stability of DE models, and the deceleration parameter are obtained. Further, the geometrical statefinder parameters s and r and a new diagnostic statefinder parameter, om(z), are evaluated and used to distinguish between the energy densities of various DE models. It is found that the studied cosmological functions show strong variation with cosmic time, and numerical results show a good agreement with observations.
Авторлар туралы
Ayman Aly
Physics Department, Faculty of Science
Хат алмасуға жауапты Автор.
Email: ayman.aly@cern.ch
Египет, Damanhour
Mustafa Selim
Theoretical Research Group, Physics Department, Faculty of Science
Email: ayman.aly@cern.ch
Египет, New Damietta City, 34517