论文标题
宇宙学的不和谐和违反缓慢通货膨胀动态的侵犯
Discordances in cosmology and the violation of slow-roll inflationary dynamics
论文作者
论文摘要
我们确定了除缓慢滚动方案以外的单场通货膨胀轨迹的示例，这些示例可改善与基线$λ$ CDM模型相比，它具有原始频谱的功率定律形式，同时减轻了诸如$ h_0 $ $ h_0 $和$ s_8 $的估计数据集中的不同数据集之间的现有紧张局势。第一个哈勃流动函数中的阻尼振荡 - 或等效地是电势的功能 - 以及原始功率频谱中相应的局部振荡，部分模仿了由于$ a_l $或$ $ $ω_k$而导致的Planck数据拟合的改善。与基线模型相比，该模型可以同时导致$ H_0 $的较大值和$ s_8 $的较小值，当最新的SH0ES测量$ H_0 $与Planck和Bk18数据结合时，这种趋势可以增强。大规模结构数据和更精确的CMB极化测量结果将进一步提供此中间快速滚动阶段的关键测试。
We identify examples of single field inflationary trajectories beyond the slow-roll regime which improve the fit to Planck 2018 data compared to baseline $Λ$CDM model with power law form of primordial spectrum and at the same time alleviate existing tensions between different data sets in the estimate of cosmological parameters such as $H_0$ and $S_8$. A damped oscillation in the first Hubble flow function - or equivalently a feature in the potential - and the corresponding localized oscillations in the primordial power spectrum partially mimic the improvement in the fit of Planck data due to $A_L$ or $Ω_K$. Compared to the baseline model, this model can lead simultaneously to larger value of $H_0$ and a smaller value of $S_8$, a trend which can be enhanced when the most recent SH0ES measurement for $H_0$ is combined with Planck and BK18 data. Large scale structure data and more precise CMB polarization measurements will further provide critical tests of this intermediate fast roll phase.
