A single scalar-field model with pre-inflationary decelerated expansion and increasing comoving Hubble horizon produces a cutoff in the primordial power spectrum that suppresses large-scale CMB correlations while recovering standard inflation at small scales.
Planck 2018 results - VII. Isotropy and statistics of the CMB
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A novel pre-inflationary model in view of the lack of angular correlation of CMB
A single scalar-field model with pre-inflationary decelerated expansion and increasing comoving Hubble horizon produces a cutoff in the primordial power spectrum that suppresses large-scale CMB correlations while recovering standard inflation at small scales.