Quantum Spectrodynamics (QSD)

Quantum Spectrodynamics (QSD) is a framework for deriving physical dynamics from eigenvalue spectra of quantum error correction codes. Its starting point is an observation: The universe is suspiciously stable. An isolated qubit in the best laboratory on Earth decoheres in microseconds. A warm, dense, radiation-bathed universe has maintained coherent, lawful, persistent structure for 13.8 billion years — the same particles, the same couplings, the same interference phenomena, everywhere we look. Quantum states are fragile; the quantum universe is not. Physics knows exactly one class of systems that preserve quantum information against continuous noise: error-corrected ones. QSD takes that observation as its single structural axiom: (L0) The universe is a quantum error-correcting code $[[n,k,d]]_q$ — with all four parameters initially unknown. Everything else is derivation. The code parameters are selected, not chosen: a seven-step exclusion chain plus Landauer's thermodynamic principle single out the perfect five-qubit code $[[5,1,3]]_2$ as the unique minimal, thermodynamically ground-state solution. The selected code's geometry then fixes three constants, and those constants fix the dynamics. QSD is a framework for deriving physical dynamics — not, specifically, a model of the Standard Model. The Standard Model sector (gauge couplings, masses) is its first worked application (v1.0, this repository's original release); the same machinery derives the code-selection theorem itself and gravitational dynamics (Phase 2, releasing incrementally as v2.x). - Holographic bit density $Hb_4 = 1/(4 \ln 2)$ — from $K_4$ (the $n−k = 4$ stabiliser/face count; the Bekenstein–Hawking factor 4 is a consequence) - Spectral bond $ϖ = π φ²$ — from $C_5$ (spectral class ratio $φ²$) - Geometric strain $ς = 3/(80 φ²)$ — from $K_4 ∪ C_5$ (the frustration of the two geometries; the framework's small parameter) Symbol Observable QSD Prediction Experimental Value Agreement $\alpha^{-1}$ Fine structure constant $137.033$ $137.036$ $-21.7$ ppm $\alpha_s(M_Z)$ Strong coupling at $M_Z$ $3π/80 = 0.11781$ $0.1180 \pm 0.0009$ $0.16\%$ $\sin^2\theta_W$ Weak mixing angle $0.23122$ $0.23122 \pm 0.00003$ $< 0.01\%$ $m_H$ Higgs boson mass $126.7$ GeV $125.25$ GeV $1.3\%$ $E_{\mathrm{syn}}$ Snap energy $28.24$ GeV $\sim 28$ GeV* $0.2\%$ * falsifiable 28.24 GeV snap energy coinciding with the CMS dimuon excess at ~28.3 GeV (CMS-PAS-HIG-20-009) A modular record This record grows by parts. Each version adds a self-contained paper with its supplements as a new section; published sources are never rewritten. Part 0 — Phase 1: the Standard Model sector (v1.0, March 2026) Main preprint (quantum_spectrodynamics) + supplements S1–S7 + technical note TN-1, with the computational validation suite and interactive visualizations. S1 formal proofs · S2 energy scale · S3 Lagrangian · S4 topological renormalization (α⁻¹) · S5 the 28 GeV prediction & proton stability · S6 string correspondence · S7 cosmological constant · TN-1 Hb notation. Part 1 — Phase 2, Paper 1: code selection (v2.0, July 2026) P1 — The QECC Selection Theorem (qsd2_p1_code_selection): why $[[5,1,3]]_2$ and nothing else — the seven-step exclusion chain from L0 plus Landauer's principle as the thermodynamic selector. With supplements: S8 — Crossing errors and Deutsch CTCs (qsd2_s8_crossing_ctc): the crossing-error channel is a Deutsch closed timelike curve; fixed-point consistency and its forensic record. S9 — The observer (qsd2_s9_observer): the observer as a code-internal structure; measurement as syndrome extraction. Supplement numbering is programme-wide (S1–S7 phase 1, S8+ phase 2). *(Future parts: P2 node & triad $→$ v2.1 · P3 lattice $→$ v2.2 · P4 transition $→$ v2.3 · P5 Einstein equations $→$ v2.4, each with its supplements. The derivation-walkthrough series and the QSD wiki knowledge base are slated for v3.)* Files on this record - quantum_spectrodynamics.pdf — main preprint (start here) - qsd2_p1_code_selection.pdf — Phase 2 Paper 1 (v2.0 entry document) - qsd2_s8_crossing_ctc.pdf — S8 crossing errors and Deutsch CTCs - qsd2_s9_observer.pdf — S9 the observer within QSD - qsd_pdfs.zip — v1 +v2 + the v1 errata, as PDFs - qsd_v2.0_full.zip — complete repository snapshot (sources, code, visualization) Epistemic transparency Phase 2 documents tag every major claim: [R] rigorous (derived from L0 + established mathematics) [C+] well-supported conjecture (named external premise) [T] thermodynamic principle (empirical) [EXP] exploratory/speculative [O] open problem Phase 1 used the coarser Derived/Constructed/Open scheme; the mapping is one-to-one. Known corrections to published sources are collected in the v1 errata (ships with v2.0); published files themselves stay frozen. Version history Version Date Adds v1.0.0 2026-03 Phase 1: main preprint, S1–S7, TN-1, code, visualizations v2.0.0 2026-09 Phase 2 Part 1: P1 code selection, S8, S9; unified preamble & bibliography; v1 errata; repository restructure (manuscripts/supplements/derivations)