Constraints on the primordial curvature power spectrum at small scales between $3\times 10^{18}$ and $4.5\times 10^{21}\mathrm{Mp}{\mathrm{c}}^{-1}$

Yupeng Yang

The primordial curvature power spectrum ${\mathcal{P}}_{\mathcal{R}}$ has been measured with high precision on large scales $10^{-4}\lesssim k\lesssim 3\mathrm{Mp}{\mathrm{c}}^{-1}$ based on observat…