Large-scale modes decouple from enhanced small-scale perturbations in single-field inflation for PBH production, rendering one-loop back-reaction unobservable under scale separation and adiabaticity.
Decoupling of large-scale, adiabatic inflationary perturbations from enhanced small-scale modes at one-loop
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Primordial black holes from inflation: on the decoupling between large and small scales
Large-scale modes decouple from enhanced small-scale perturbations in single-field inflation for PBH production, rendering one-loop back-reaction unobservable under scale separation and adiabaticity.