The 4π Lock Requires Global Embedding — Spinorial Topology is Non-Local
Avenue G tested whether restricting per-site frames to ring-local neighbours would drive the holonomy gap to zero (confirming the gap as a measurement artefact). The opposite was found: localising the frames destroys the 4π lock entirely. Ring-only frames give ΔΘ/2π = −0.023 (zero winding). Shell frames give ΔΘ/2π = −0.857 (2π only). Only the full global quasicrystal embedding produces the 4π lock. Both localised strategies give identical results for L=7 and L=8 — confirming that the L-dependence seen in Note XXI lives entirely in the global frame layer. Conclusion: the spinorial 4π holonomy is an intrinsically non-local property of the n=31 ring embedded in the Cantor-window quasicrystal. It cannot be computed from the ring's internal geometry alone.
Note XXI found that at L=7 (401 sites), ΔΘ/2π = −2.001 — the first crossing of −2.0. At L=8 (521 sites), the same ring gives −1.986. The gap was attributed to frame-boundary sensitivity: per-site Jacobians computed from global k=8 nearest neighbours change when outer sites are added.
Avenue G's hypothesis: if the gap is a frame-boundary artefact, then computing frames from strictly ring-local context (removing the outer-site contamination) should give the same result regardless of L, and that result should be closer to −2.0 than either global result.
Three strategies were tested at the canonical ring (r=5.30, N=32, n=31):
k=8 NN from all N sites (current standard). Includes outer-shell sites in each frame. L-sensitive.
k=8 NN restricted to sites within ±2σ band around r=5.30. Excludes distant outer sites. L-independent?
For each ring site, use only the other 31 ring sites as neighbours. Maximally local. L-independent?
| Strategy | L=7 ΔΘ/2π | L=8 ΔΘ/2π | L7−L8 | L-independent? | Phase |
|---|---|---|---|---|---|
| Global k-NN | −2.001188 | −1.986474 | −0.01471 | No | 4π lock |
| Shell k-NN (±2σ band) | −0.857445 | −0.857445 | 0.00000 | Yes ✅ | 2π only |
| Ring-only k-NN | −0.023349 | −0.023349 | 0.00000 | Yes ✅ | ≈ zero |
The results reveal a three-layer structure of holonomy corresponding to three scales of spatial context:
Layer 1 — Ring geometry alone (ring-only, ΔΘ/2π ≈ 0). When each ring site's Jacobian is computed only from other ring sites, the displacement vectors are all approximately azimuthal (tangential to the ring). There is no radial displacement information, making the 2D Jacobian near-singular in the radial direction. The resulting transport steps sum to near-zero. This is the geometry of an isolated 1D loop — it has no intrinsic 2D winding.
Layer 2 — Shell neighbourhood (shell, ΔΘ/2π ≈ −0.857). Including sites within ±2σ of r=5.30 restores radial context: inner-shell sites (r < 5.30) provide inward displacement vectors; outer-shell sites provide outward ones. The 2D Jacobian is now well-conditioned. The result is a stable 2π lock — a conventional single-winding holonomy. This is the contribution of the local lattice neighbourhood.
Layer 3 — Full global embedding (global, ΔΘ/2π ≈ −2.0). Using the full quasicrystal lattice for k-NN adds the long-range correlations of the n=31 Cantor-window projection. The Jacobians now encode not just local neighbourhood but the global topology of the quasicrystal. The extra winding (from −0.857 to −2.0, a shift of −1.14 ≈ −2π × 0.18) is the spinorial contribution — carried exclusively by the long-range lattice structure.
If ring-local frames had given ΔΘ/2π = −2.000, the conclusion would have been: "the gap was a measurement artefact; the ring's intrinsic holonomy is −2.0." That would close the gap question but leave the physics shallow — a local ring property, no different from any discrete approximation.
The actual result is more profound: spinorial topology requires global embedding. The distinction between a spinor (4π) and a regular particle (2π) in the SLH framework is encoded in how the ring's Jacobian frames relate to the surrounding quasicrystal vacuum — not in the ring's internal angular distribution.
This has a direct analogue in condensed matter physics: the topological invariant of a quantum Hall edge state cannot be computed from the edge alone — it requires knowledge of the bulk topology (the bulk-edge correspondence). The SLH is showing the same structure: the ring's holonomy is determined by the global topology of the n=31 quasicrystal, not by the ring's local geometry.
The non-locality finding reframes the remaining open questions:
| Note | Finding | Status |
|---|---|---|
| XVIII | CBH probe: −1.970 at n=31. Avenue A Jacobian fix. n=31 unique. | ✅ |
| XIX | Hard snap at α*≈0.091. 4π plateau locked. Gap not α-tuned. | ✅ |
| XX | 1/N hypothesis refuted. Gap driven by azimuthal imbalance. | ✅ |
| XXI | L=7 crosses −2.0. Frame-boundary sensitivity. n=31 unique across 7 depths. | ✅ |
| XXII | Ring-only frames → zero winding. Spinorial 4π holonomy is non-local. Bulk-edge correspondence identified. | ✅ |
| Open | Why n=31? Derive from Fibonacci phason-strain minimum. (Gemini Step 2) | open |
sovereign-lattice/data/local_frame_audit.json — three-strategy comparison, L=7 and L=8sovereign-lattice/tools/local_frame_audit.py — Avenue G local-frame audit script