论文标题
带有$ g $的瑞士奶酪宇宙学和$λ$从重新归一化组中
Swiss-cheese cosmologies with variable $G$ and $Λ$ from the renormalization group
论文作者
论文摘要
关于暗能和暗物质本质的令人信服的解释仍然缺失。在最近的著作中，RG改良的瑞士智慧宇宙学具有不断发展的宇宙常数，依赖于\ sch半径是解释观察到的宇宙加速度的有前途的模型。在这项工作中，我们扩展了该模型，以考虑牛顿常数$ g $和宇宙常数$λ$的合并缩放，根据IR固定点的假设。我们将表明，我们的模型很容易生成观察到的最近从减速到加速度的通过，而无需额外的能量尺度，外来的场或微调。为了检查该概念的普遍性，已经分析了两个不同的扩展关系，我们证明两者都与$λ$ CDM宇宙学非常吻合。我们还表明，我们的模型满足了$ \ dot {g}/g $的观察性局部约束。
A convincing explanation for the nature of the dark energy and dark matter is still missing. In recent works a RG-improved swiss-cheese cosmology with an evolving cosmological constant dependent on the \sch radius has been proven to be a promising model to explain the observed cosmic acceleration. In this work we extend this model to consider the combined scaling of the Newton constant $G$ and the cosmological constant $Λ$ according to the IR-fixed point hypothesis. We shall show that our model easily generates the observed recent passage from deceleration to acceleration without need of extra energy scales, exotic fields or fine tuning. In order to check the generality of the concept, two different scaling relations have been analysed and we proved that both are in very good agreement with $Λ$CDM cosmology. We also show that our model satisfies the observational local constraints on $\dot{G}/G$.
