论文标题
可行的$ f（r）$重力黑能模型的全景图
A Panorama of Viable $F(R)$ Gravity Dark Energy Models
论文作者
论文摘要
在这项工作中，我们将研究几种$ f（r）$重力模型的后期动态。通过根据红移和状态函数适当地表达场方程，我们应使用适当的物理动机初始条件来数字求解字段方程。我们认为通过构造的模型在早期时代的近乎$ r^2 $模型描述，我们对参数进行了微调，以实现与最新的Planck限制在后期达到的生存能力和兼容性。这样的模型提供了对通货膨胀和黑暗能源时代的统一描述，并且所有模型的共同特征是暗能振荡的存在。此外，我们表明，与一般的相对论流体和标量场描述相反，由简单的$ f（r）$重力模型产生了大量不同的深色能量物理，从幻影到几乎是de de de de teer，以及典型的深色能量。
In this work we shall study the late-time dynamics of several $F(R)$ gravity models. By appropriately expressing the field equations in terms of the redshift and of a statefinder function, we shall solve numerically the field equations using appropriate physical motivated initial conditions. We consider models which, by construction, are described by a nearly $R^2$-model at early epochs and we fine tune the parameters to achieve viability and compatibility with the latest Planck constraints at late times. Such models provide a unified description of inflation and dark energy era and notably a common feature of all the models is the presence of dark energy oscillations. Furthermore, we show that, in contrast to general relativistic fluids and scalar field descriptions, a large spectrum of different dark energy physics is generated by simple $F(R)$ gravity models, varying from phantom, to nearly de Sitter and to quintessential dark energy eras.
