Boundary-Induced Phase Deformation in CMB Observables

This work presents a phase-based reinterpretation of TT, EE, and TE CMB observables, demonstrating that apparent mode differentiation arises from boundary-induced phase deformation rather than independent primordial origins. The accompanying supplementary tool provides a browser-based implementation of the boundary-aware phase reconstruction framework, enabling full reproducibility of the reported results. This study does not introduce new primordial physics, but clarifies the role of observational and projection boundaries in phase-based analyses of CMB data.