{
  "abstract": "FINDING: Topological insulators are bulk-insulating, edge-conducting quantum phases; disorder-driven metal-TI transition exhibits critical exponent ν≈2.7, consistent with conventional metal-insulator universality. MATH: - **Z₂ topological invariant** (Fu-Kane-Mele): ν₀ ∈ {0,1} distinguishes trivial vs. topological insulator, computed via Pfaffian of the Bloch Hamiltonian's time-reversal polarization: \\[ (-1)^{ν₀} = \\prod_{TRIM} \\frac{\\text{Pf}[w(\\Gamma_i)]}{\\sqrt{\\det[w(\\Gamma_i)]}} \\] where Γᵢ are time-reversal invariant momenta (TRIM). - **Bulk-boundary correspondence**: edge states count = |ν₀| mod 2 (for 2D), or surface Dirac cones for 3D. - **Critical exponent** from arXiv:1211.5026: ν = 2.7 ± 0.1 (localization length scaling), matching metal-ordinary insulator transitions (ν ≈ 2.7) — no new universality class. - **Higher-order TIs** (Bradlyn talk): corner/hinge modes governed by nested Wilson loops, quantized by **Z₂ × Z₂** or **Z₄** invariants — e.g., 3D se\n\nAuthor: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com",
  "abstract_shown": true,
  "affiliations": [
    "Independent Researcher, United Kingdom"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 1,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Andrew Stewart Caldin"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bks7s3cwsggfm.bib",
  "cited_by": 0,
  "doi": "10.5281/zenodo.23525889",
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  "id": "bks7s3cwsggfm",
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  "language": "eng",
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  "published": "2026-10-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bks7s3cwsggfm.ris",
  "sources": [
    {
      "first_seen": "2026-11-04T12:21:53Z",
      "native_id": "23525889",
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      "url": "https://zenodo.org/records/23525889"
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  "subjects": [],
  "title": "Disorder-Driven Metal-Topological Insulator Transition Exhibits Universal Critical Exponent ν≈2.7 — E8 Intelligence Research",
  "title_text": "Disorder-Driven Metal-Topological Insulator Transition Exhibits Universal Critical Exponent ν≈2.7 — E8 Intelligence Research",
  "type": "preprint",
  "updated_at": "2026-11-04T12:21:53Z",
  "url": "https://research.draconitic.com/paper/bks7s3cwsggfm",
  "venue": "Zenodo",
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}