Supplementary material for "Non-local kernel-induced two-phonon binding and emergence of a coherent mode in superfluid He-4"

This archive contains the supplementary material associated with the manuscript“Non-local kernel-induced two-phonon binding and emergence of a coherent mode in superfluid He-4”. It includes auxiliary theoretical material and computational scripts used to support and illustrate the kernel-based non-local binding mechanism discussed in the paper. The contents are provided to ensure transparency and reproducibility of the analysis.