论文标题
高斯重力中的弹跳宇宙
Bouncing universe in Gauss-Bonnet gravity
论文作者
论文摘要
在本文中，在Flat Flrw模型的背景下研究了一种弹跳的宇宙学场景，该模型具有特定的参数化双曲线形式的比例因子$ a $的$ t $，其中$λ$被视为模型参数。在$ f（r，g）$形式主义中讨论了该模型，其结构为$ f（r，g）= r+f（g）$，其中$ r $是ricci scalar，而$ g $是高斯 - 骨网不变。认为哈勃参数的拟议功能形式以满足模型的弹跳标准的方式进行了考虑，该标准没有初始奇异性。讨论了模型的物理后果。在此模型中，可以看到EOS参数在弹跳点$ t \ of0 $的附近穿过五重量线$ω= -1 $，这对于成功弹跳的宇宙学模型来说是非常强大的标准。最后，我们发现弹跳模型的所有基本特征都可以成功满足。
In this paper, a bouncing cosmological scenario is studied in the background of a flat FLRW model with a specific parametrized hyperbolic form of scale factor $ a $ in terms of $ t $, where $ λ$ is taken as the model parameter. This model is discussed in $ f(R,G) $ formalism having structured as $ f(R,G)=R+F(G) $, where $ R $ is Ricci scalar and $ G $ is the Gauss-Bonnet invariant. The proposed functional form of the Hubble parameter is considered in such a way that it satisfies the bouncing criteria of the model, which is free from the initial singularity. The physical consequences of the model are discussed. In this model, one can see that the EoS parameter crosses the quintom line $ ω=-1 $ in the neighborhood of bouncing point $ t\approx0 $, which is a very strong criterion for a successful bouncing cosmological model. Finally, we find that all the essential features of the bouncing model are satisfied successfully.
