Shen Fold: Deterministic Scalar Propulsion Extending White et al. (2026)

The Alcubierre metric (1994) demonstrated in principle that spacetime warping could enable superluminal travel without violating local Lorentz invariance. All subsequent refinements, including White et al. (Phys. Rev. Res. 2026), retain a fundamental barrier: negative energy density or exotic matter is required to stabilize the propulsion bubble. We present a fully deterministic, energy-positive alternative: Shen Fold propulsion extending White et al. (2026). The quantum vacuum is modeled as a nonlinear scalar field phi obeying a modified Klein-Gordon Lagrangian with toroidal knot topology. Propulsion arises from a controlled compress-rarefy asymmetry generating a self-sustaining gradient; the craft surfs inside a protected coherence bubble. The mechanism is the nonlinear completion of White’s compressible acoustic vacuum, with the measured coupling constant gamma approx 10^-6 supplied by Paper B (Zenodo preprint currently under review). Quantitative simulation results (2D numerical demonstration with explicit parameters), a stability inequality, energy budget, and Schumann resonance lock-in condition are derived. No exotic matter required. Experimental verification path provided. For inquiries & collaboration: contact@shenai.ai