论文标题
根据最近的宇宙学紧张局势，哈里森 - 泽尔多维奇频谱的返回
Return of Harrison-Zeldovich spectrum in light of recent cosmological tensions
论文作者
论文摘要
标量扰动的频谱指数$ n_s $是通货膨胀理论为我们可观察到的宇宙设定的重要初始条件。根据普朗克的结果，当前约束为$ n_s = 0.965 \ pm 0.004 $，而精确的标准式Harrison-Zeldovich Spectrum，即$ n_s = 1 $，已被排除在8.4σ$ sightance上。但是，众所周知，标准的$λ$ CDM模型正遭受哈勃张力的困扰，该张力为$ \ sim5σ$显着性水平。这种不一致可能表明，终于散射表面的合并声层高于预期，因此似乎要求$ n_s = 1 $的返回。在这里，鉴于最近的观察结果，我们发现了$ n_s = 1 $宇宙的有力证据。我们表明，如果是这样，将通过CMB-S4实验来确认。
The spectral index $n_s$ of scalar perturbation is the significant initial condition set by inflation theory for our observable Universe. According to Planck results, current constraint is $n_s = 0.965\pm 0.004$, while an exact scale-invaiant Harrison-Zeldovich spectrum, i.e. $n_s=1$, has been ruled out at $8.4σ$ significance level. However, it is well-known that the standard $Λ$CDM model is suffering from the Hubble tension, which is at $\sim 5σ$ significance level. This inconsistency likely indicates that the comoving sound horizon at last scattering surface is actually lower than expected, which so seems to be calling for the return of $n_s=1$. Here, in light of recent observations we find strong evidence for a $n_s=1$ Universe. And we show that if so, it would be confirmed conclusively by CMB-S4 experiment.
