Vacuum Folding Dynamics: Stochastic Resonance in the Vacuum Field — Delta-Injection and Non-Topological Amplification Channels

Previous work in this series identified a technology gap of 10²⁰–10⁴⁰ in the Mathieu q-parameter separating the detection regime from macroscopic vacuum-field engineering. This estimate assumes linear, direct amplification of σ_f perturbations. The present paper explores whether the gap can be circumvented through indirect mechanisms that exploit the nonlinear and stochastic structure of the VFD vacuum. We develop three concepts: (i) delta-injection — the principle that a minimal, precisely targeted perturbation can trigger a disproportionately large response if the system is near a nonlinear threshold; (ii) stochastic resonance — the counter-intuitive phenomenon where vacuum noise enhances rather than degrades the coherent response to a weak periodic driving force; and (iii) non-topological cascade channels — multi-mode coupling pathways in the σ_f spectrum that are not protected by the BKT topological barrier (T_eff/T_BKT ~ 10⁻⁶¹) and may permit exponential amplification through mode–mode energy transfer. We show that the quartic potential U(y) = y⁴ − 4y³/3 satisfies the necessary conditions for stochastic resonance: critical structure (a degenerate maximum at y = 0 and a minimum at y = 1) that under Mathieu driving generates an effective bistable potential for the oscillation amplitude, a periodic driving force (the Mathieu term), and a noise source (quantum vacuum fluctuations). While the barrier height (Δu = 0.033) corresponds to a macroscopic energy scale (1.73×10⁻¹⁵ GeV⁴), localised barrier crossings in the field configuration space — analogous to nucleation events in first-order phase transitions — could occur at vastly reduced energy cost. We derive the Kramers escape rate for σ_f fluctuations across the potential barrier, estimate the stochastic resonance enhancement factor, and identify the conditions under which the effective technology gap could be reduced from 10²⁰–10⁴⁰ to 10⁸–10¹⁵. The analysis reveals a new epistemic category: results that are derived in their mathematical structure but whose numerical magnitude depends on the third- and fourth-order terms in the σ_f dynamics, which have not been calculated.