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Bouncing scenario of general relativistic hydrodynamics in extended gravity
Communications in Theoretical Physics ( IF 2.4 ) Pub Date : 2021-01-16 , DOI: 10.1088/1572-9494/abcfb2
A Y Shaikh 1 , B Mishra 2
Affiliation  

In this paper, we have framed bouncing cosmological model of the Universe in the presence of general relativistic hydrodynamics in an extended theory of gravity. The metric assumed here is the flat Friedmann–Robertson–Walker space–time and the stress energy tensor is of perfect fluid. Since general relativity (GR) has certain issues with late time cosmic speed up phenomena, here we have introduced an additional matter geometry coupling that described the extended gravity to GR. The dynamical parameters are derived and analyzed. The dynamical behavior of the equation of state parameter has been analyzed. We have observed that the bouncing behavior is mostly controlled by the coupling parameter.



中文翻译:

广义相对论流体动力学在引力作用下的弹跳情形

在本文中,我们在引力扩展理论中,在存在广义相对论流体力学的情况下,构造了宇宙的弹跳宇宙学模型。这里假设的度量标准是平坦的Friedmann-Robertson-Walker时空,并且应力能张量是完美的流体。由于广义相对论(GR)在后期宇宙加速现象方面存在某些问题,因此在此我们引入了附加的物质几何耦合,该耦合描述了重力对GR的扩展。推导并分析了动力学参数。分析了状态方程方程的动力学行为。我们已经观察到弹跳行为主要由耦合参数控制。

更新日期:2021-01-16
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