论文标题
$α$ - 吸引者的统一黑暗能源的统一框架
Unified framework for Early Dark Energy from $α$-attractors
论文作者
论文摘要
缓解哈勃张力的最吸引人的方法之一是包括早期的暗能量（EDE）组件，该组件在重组时在狭窄的红移窗口中为宇宙增添了能量，并且比之后的辐射更快。在本文中，我们在$α$ ATTRACTOR模型的框架中分析EDE。众所周知，减轻哈勃张力的成功取决于能量注入的形状。由于选择了受$α$ Attractor模型启发的潜在功能形式的自由，我们展示了如何轻松获得不同类型的能量注射。为了确认我们的直觉，我们对三种代表性案例进行了MCMC分析，并发现$ H_0 $明显大于其他EDE模型中的$λ$ CDM中的大量大。与具有超级Planckian衰减常数的轴驱动的EDE模型不同，数据所需的EDE模型的曲率在$α$ - 吸引者的最新理论发展的背景下是自然的。
One of the most appealing approaches to ease the Hubble tension is the inclusion of an early dark energy (EDE) component that adds energy to the Universe in a narrow redshift window around the time of recombination and dilutes faster than radiation afterwards. In this paper, we analyze EDE in the framework of $α$-attractor models. As well known, the success in alleviating the Hubble tension crucially depends on the shape of the energy injection. We show how different types of energy injections can be easily obtained, thanks to the freedom in choosing the functional form of the potential inspired by $α$-attractor models. To confirm our intuition we perform an MCMC analysis for three representative cases and find indeed that $H_0$ is significantly larger than in $Λ$CDM like in other EDE models. Unlike axion-driven EDE models with super Planckian decay constant, the curvature of EDE models required by the data is natural in the context of recent theoretical developments in $α$-attractors.
