论文标题
典型的$α$ -ATTRACTOR通货膨胀：IV阶段Galaxy调查的预测
Quintessential $α$-attractor inflation: forecasts for Stage IV galaxy surveys
论文作者
论文摘要
$α$ - 吸引者典型通货膨胀的单场模型提供了两个早期和后期宇宙加速度的统一图片，在这种情况下，通货膨胀和暗能量都通过单个标量的自由度来描述，从而降低了失控的潜力。这些理论上动机的模型具有与现有宇宙学数据一致的独特观察性预测。我们表明，即使没有考虑其他宇宙学数据集，下一代的大规模结构调查也会强烈限制这些模型的参数空间，并根据标准宇宙学模型和更常规的非质量通货膨胀进行测试。特别是，我们期望$ \ mathcal {o}（10^{ - 5} \ Mathrm { - } 10^{ - 4}）$约束状态及其时间导数的目前值，$ W_0 $和$ W_A $。我们还预测，与标准模型的期望相比，在原始曲率扰动$ n_s $的光谱指数上的限制更加紧密。这证明了即将到来的大规模结构探针与旨在通过观察$ b $ mmode的宇宙微波背景极化来衡量张量与量表$ r $之间的强大协同作用。
Single-field models of $α$-attractor quintessential inflation provide a unified picture of the two periods of early- and late-time cosmic acceleration, where both inflation and dark energy are described by a single scalar degree of freedom rolling down a runaway potential. These theoretically well-motivated models have distinct observational predictions that are in agreement with existing cosmological data. We show that the next generation of large-scale structure surveys, even when no other cosmological data sets are considered, will strongly constrain the parameter space of these models, and test them against the standard cosmological model and more conventional non-quintessential inflation. In particular, we expect $\mathcal{O}(10^{-5}\mathrm{-}10^{-4})$ constraints on the present values of the dark energy equation of state and its time derivative, $w_0$ and $w_a$. We also forecast more than one order of magnitude tighter constraints on the spectral index of primordial curvature perturbations $n_s$ compared to the expectations for the standard model. This demonstrates the powerful synergy between the upcoming large-scale structure probes of inflation and those aiming to measure the tensor-to-scalar ratio $r$ through the observation of $B$-mode polarization of the cosmic microwave background.
