Preprint Proposes Universal CMB Phase Coherence from Single-Field Inflation

A new preprint suggests that the phase coherence of primordial perturbations, which influence the Cosmic Microwave Background's acoustic peaks, is determined solely by the observed primordial spectrum. This finding challenges current expectations for inflationary scenarios, implying independence from the inflationary energy scale and subsequent expansion history. As a preliminary, non-peer-reviewed study, further validation is needed.