V₀ Disappearance Theory: Master Theory Record v1.8 — Transitional Regime, Dark-Bridge Limits, and the Physical Selection of Histories

Abstract

This technical research record provides a bounded, author-approved extension of the V₀ Disappearance Theory programme. Edition v1.8 preserves the 22-page Master v1.7 as an unchanged facsimile and adds two sections. Section 21 consolidates conditional results on a hypothesized structured transitional regime (Σ), its distinction from strict V₀, relational scale constraints, a candidate dark-matter bridge, limitations of a specific composite-metric construction, and unresolved physical entry and return laws. Section 22 incorporates established quantum-physical results on endpoint-identical but operationally distinguishable histories, coherent memory and reference requirements, Berry holonomy, Jahn–Teller dynamics, and phase/state selection in frustrated Josephson systems. It also records a restricted two-slot tester result without a claim of priority and explains why ordinary physical mechanisms can reproduce seemingly novel selector signatures. Established literature is intentionally incorporated when it provides useful mechanisms or rigorous limitations; originality is not a condition for inclusion. None of the additions derives controlled whole-body disappearance, a physical transition into strict V₀, complete Standard-Model/gravitational all-link disconnection, or a V₀-specific observable. The central hypothesis remains open and unestablished. This is a technical research record, not an independently peer-reviewed experimental report.