{"id":"30ec1f1e-f347-4047-9dae-334ef7881133","arxiv_id":"2509.25060","paper_version":2,"verdict":"CONDITIONAL","confidence":"MODERATE","novelty_score":7.0,"correctness_risk":"medium","formal_verification":"none","parameter_count":2,"one_line_summary":"A many-body diagrammatic theory computes 2D THz spectroscopy maps from third-order nonlinear kernels, separates paramagnetic and diamagnetic processes, and shows propagation through the sample can dominate and mask the intrinsic signal.","lead":"This paper builds a diagram-based theoretical framework for computing two-dimensional terahertz spectroscopy (2DTS) maps of electronic systems, and shows that light propagation inside a sample can mask the intrinsic nonlinear response. It separates the signal into two classes of microscopic light-matter processes and demonstrates the method on charge-density-wave and Josephson-plasmon models.","discovery_kind":"new_method","skeptic_critique":null,"referee_report":null,"author_rebuttal":null,"desk_editor":null,"rs_alignment":null,"lean_confirmation":null,"pith_extraction":null,"created_at":"2026-08-04T13:51:42.472462+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":null,"supporting_citations":[],"review_version":1}