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Study of Entropy-Corrected Models Using Dark Energy in the Framework of a Complementary Gravitational Field
Gravitation and Cosmology ( IF 0.9 ) Pub Date : 2019-08-28 , DOI: 10.1134/s0202289319030034
Ayman A. Aly , Mustafa M. Selim

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.

中文翻译:

互补引力场框架下利用暗能量的熵校正模型的研究

互补引力场的暗能量(DE)模型用于解决熵校正的宇宙学模型。主导的DE宇宙可以起源于真空能与另一个互补引力场之间的间接耦合。这个想法与熵校正模型一起用于研究宇宙中DE的演化。零点能量是通过单环校正计算得出的,并用于重建比例因子和Hubble参数。然后将其用于评估相互作用和非相互作用的DE和宇宙压力的状态方程(EoS)参数。获得用于评估DE模型稳定性的声速平方,以及减速度参数。此外,几何状态查找器参数sr以及评估新的诊断状态查找器参数omz)并将其用于区分各种DE模型的能量密度。结果表明,所研究的宇宙学函数随宇宙时间变化很大,数值结果与观测值吻合良好。
更新日期:2019-08-28
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