Notes on Diagrammatic Coaction for Cosmological Wavefunction Coefficients: A Two-Site Prelude
High Energy Physics - Theory
2026-03-27 v1
Abstract
We study the coaction of cosmological wavefunction coefficients of conformally coupled scalars in FRW background of a two-site example, which turns out to have an elegant diagrammatic interpretation. We show how the coaction acts on the twisted integrals for wavefunction coefficients, decomposing them into contributions associated with subtopologies and cuts, with the subtopologies admitting an interpretation as time-ordered integrals. This provides a clear interpretation of their analytic structure and suggests a broader applicability to more general cosmological diagrams.
Keywords
Cite
@article{arxiv.2603.25698,
title = {Notes on Diagrammatic Coaction for Cosmological Wavefunction Coefficients: A Two-Site Prelude},
author = {Yuhan Fu and Jiahao Liu},
journal= {arXiv preprint arXiv:2603.25698},
year = {2026}
}
Comments
18 pages