Quantum Structural Theory of Harmony (QSTH 6.4) – Feynman Diagrams as a Ledger Language

Quantum Structural Theory of Harmony (QSTH 6.4) — Demarcation Layer: QSTH vs. Feynman Diagrams, Coherence Ledger, Time Ordering, and the “Antiparticle Back-in-Time” Phrase Without Magic QSTH 6.4 is a compact demarcation note designed to bridge standard quantum field theory (QFT/QED) diagrammatics and the QSTH operational ledger program. It does not replace QFT. Instead, it adds an interpretation-safety layer that makes a single distinction explicit and usable: ΔS_coh (coherent regime): amplitudes, phases, interference, time-ordering contributions, and diagrammatic bookkeeping; Φ₁–Φ₂ (closure interface): the transition where the information type changes; ΔS_red (closed regime): observable outcomes, statistical facts, irreversibility, and the operational arrow of time. A key theme is the widespread phrase “an antiparticle is a particle moving backward in time.” In QFT, this statement is a legitimate formal rewriting (crossing/orientation of charge-flow and equivalent amplitude representations), not a physical mechanism for sending information to the past. QSTH 6.4 explains why the “back-in-time” intuition appears naturally in the coherent computation layer (ΔS_coh), while signal causality remains intact after closure into observables (ΔS_red). Continuity with the QSTH 6.0–6.3 operational series This release is intended as a direct extension of QSTH 6.0–6.3. It strengthens the operational program by clarifying where QFT’s diagrammatic machinery belongs in the ledger picture: diagrams as coherent bookkeeping (ΔS_coh) and measurement/trace/coarse-graining as closure into factual statistics (ΔS_red). This demarcation improves auditability, cross-channel interpretability, and “model-closure hygiene” for I-Dim mediation, DM/DE mapping, and arrow-of-time diagnostics introduced in QSTH 6.3. What this release offers researchers (practical value) A clean rule-set separating computational QFT machinery from closure/irreversibility assumptions. A ledger-compatible interface view: amplitudes remain QFT-native, while closure is made explicit and testable. A falsification-first mindset: null outcomes are treated as publishable constraints that refine systematics rather than being discarded. A cross-disciplinary teaching bridge: diagrams are not “movies of reality,” but structured terms in amplitude bookkeeping. Research program / next steps (what to test) Closure-bias tests across independent datasets and pipelines. Cross-channel invariance checks (consistency of closure across cosmological probes). Arrow-of-time diagnostics via regimes where irreversibility terms must dominate. Minimal diagram/EFT-to-ledger translation pipelines with uncertainty propagation. Independent closure constraints from luminous growth channels (Eddington / super-Eddington accretion). Archive note: Foundational releases QSTH 0–QSTH 4.0 are archived and published on OSF. (QSTH 6.0–6.3 are the operational CORE releases on Zenodo.) Related QSTH Zenodo records (recommended entry points) QSTH 1.0 — Foundational Publication — DOI: 10.5281/zenodo.17455814QSTH 1.0 — Horizon Set — DOI: 10.5281/zenodo.18015679QSTH 4.1 — Planckian Horizon 2.0: The Entropic Bridge between Quantum and Cosmological Reality — DOI: 10.5281/zenodo.17899867QSTH 5.2 — OMEG: The Operational Metric Plane of Entropic Geometrodynamics — DOI: 10.5281/zenodo.17937840QSTH 6.0 — The Info-Dim (I-Dim) Package — DOI: 10.5281/zenodo.18156387QSTH 6.1 — Entropic Zero (E0) & Entropic Stars — DOI: 10.5281/zenodo.18165254QSTH 6.2 — Vacuum as an Entropic Ledger and the Origin of Baryon Asymmetry — DOI: 10.5281/zenodo.18641674QSTH 6.3 — Ledger Reality Reconstruction: I-Dim Mediation, DM/DE, and Arrow-of-Time Diagnostics (with the Eddington Paradox) — DOI: 10.5281/zenodo.18646924QSTH 6.4 — QSTH vs. Feynman Diagrams — DOI: 10.5281/zenodo.18648120QSTH 6.5 — Planckian Horizon 2.0 as a Ledger Boundary — DOI: 10.5281/zenodo.18649631QSTH 6.6 — Planckian Horizon 2.0 as an Operational Entropic-Coherence Principle — DOI: 10.5281/zenodo.18701036QSTH 6.7 — Variational Entropic Lagrangian (R10) — DOI: 10.5281/zenodo.18715255QSTH 6.8 — Mendeleev Table of Relationships among Physical Constants — DOI: 10.5281/zenodo.18762028QSTH 6.9 — I-Dim Elementary Coupling and Semi-I-Dim Classification of the Fine Structure Constant α ≈ 1/137 — DOI: 10.5281/zenodo.18864069QSTH 6.10 — The Fifth Dimension as an Account: A Ledger Formulation in (3+1)D — DOI: 10.5281/zenodo.18871791QSTH 6.11 — The Galois Ledger: Horizon Projection Π : Ω → 𝓛, Gauge Redundancy G, and Operational Invariants S/T/J — DOI: 10.5281/zenodo.18879079QSTH 6.12 — The Emergence of Dimensions as an Entropic Reconstruction — DOI: 10.5281/zenodo.18899448