Removal of the spatial cutoff for weakly coupled P(phi)_2

Removal of the spatial cutoff for weakly coupled P(φ)₂

Documentation for a Hamiltonian proof that the net of spatially cutoff P(φ)₂ ground states converges in norm on every local algebra. This is a research record, not a published paper.

Read this first. Theorem 12.2 is conditional on the imported interface U_GJS. Nothing here has been refereed; audit item C5 is open; the work is AI-assisted and human verification of it is ongoing. Treat every statement as a claim under active verification. See status.

The result

For the spatially cutoff P(φ)₂ Hamiltonian H(g) with ground state Ω_g, and ω_g the induced state on the time-zero quasi-local algebra A, in the Glimm–Jaffe–Spencer weak-coupling region 0 ≤ λ/m₀² < ε_P the full net (ω_g) — no subnets, no space averaging — converges in norm on every local algebra A(O),

\lim_{g\in\mathcal G}\ \bigl\|(\omega_g-\omega_\infty)|_{\mathfrak A(O)}\bigr\| = 0 ,

with an explicit super-polynomial rate in dist(O, {g < 1}). The limit is locally normal, translation invariant, ℤ₂ invariant for even P, and a ground state of the Glimm–Jaffe dynamics in the spectral sense.

Where to go

   
Status what is proved, what is conditional, what is open, and the gate record
Results every numbered statement, with dependencies — generated from the manuscript
Imports A1–A8, their sources, and exactly what U_GJS is and is not
Definitions the model, the three cutoff classes, the plateau net
Notation the frozen notation table
Provenance gates, corrections history, the citation dossiers
Figures eight interactive illustrations of the main results

The manuscript itself is part_i/main.pdf (40 pp, document of record).

The shape of the proof

The route is Hamiltonian rather than Euclidean. Two uniform inputs are established over the cutoff class — a local interaction moment (M₂, Theorem 5.1) and a gap (G, Theorem 7.8) — and then a local perturbations perturb locally estimate is run along an affine path of cutoffs. The LPPL step rests on two exact ingredients rather than approximate ones: an exact inverse-energy filter (Lemma 9.1) that converts the gap into a super-polynomially decaying time kernel, and the exact light cone of the cutoff dynamics (Proposition 2.7), which confines a time-evolved local observable. Their combination is the two-regime bound (Lemma 10.3), and summing it over cells gives the rate function Ψ_γ (Lemma 10.5), which decays faster than every polynomial.