论文标题
现象学重力相变：晚期和早期宇宙之间的和解
Phenomenological Gravitational Phase Transition: Reconciliation between the Late and Early Universe
论文作者
论文摘要
在这项工作中，我们研究了宇宙中重力相变（GPT）的形式是否可以减少外部$ planck $张力，并以本地哈勃测量和物质的分布（以$σ_8$的$σ_8$的内部估计和低位符合$ nemightigh和lensigh Amplightigh和losightigh和lensigh的范围）来减少一定的现象学扩展（GPT）的形式。我们将新的自由度引入背景，并在牛顿仪表中引入两个标量扰动方程，并从早期的引力阶段同时过渡，等于GR向后期。我们将过渡模拟为通过过渡红移$ z _ {\ rm t} $和宽度$α$参数的“ tanh”，其背景和扰动分别为agpludes $λ（z）$和$（z），γ（z），γ（z））$。我们验证了GPT框架中此工作中使用的数据集的一致性，并确认各个紧张局势不需要冲突的过渡。我们发现，关节数据集更喜欢在$ z {\ rm t} \大约0.9 $的近期过渡，在后台和扰动的爱因斯坦方程，主要由本地哈勃测量驱动。这种过渡放松了这项工作中考虑的所有紧张局势。
In this work we investigate whether a certain phenomenological extension to the general relativity (GR), in the form of a gravitational phase transition (GPT) in the Universe, can reduce the external $Planck$ tensions with the local Hubble measurements and the distribution of matter, characterized by $σ_8$, as well as its internal inconsistencies in the lensing amplitude and the low--high $\ell$ parameter estimates. We introduce new degrees of freedom into the background and the two scalar perturbation equations in the Newtonian gauge, with simultaneous transitions from an early gravitational phase equivalent to GR toward a late phase. We model the transition as a "tanh" parametrized by the transition redshift $z_{\rm t}$ and width $α$, with amplitudes $Λ(z)$ and $(μ(z),γ(z))$ for the background and perturbations respectively. We verify the consistency of the datasets used in this work in the GPT framework and confirm that the individual tensions do not require conflicting transitions. We find that the joint datasets prefer a recent transition at $z_{\rm t}\approx 0.9$ in the background and perturbed Einstein equations, driven mainly by the local Hubble measurement. This transition relaxes all the tensions considered in this work.
