Evolution of the RST Core Equation
RST Core Equation Evolution
📐 The original RST core equation:
(∂t² S − c² ∇² S + β S³) = σ(x,t) ⋅ FR(C[Ψ])
- ∂t² S — Inertial Term: Time evolution of the Substrate field (resistance to change).
- − c² ∇² S — Elastic Term: Wave propagation at finite speed, driven by Substrate tension.
- + β S³ — Nonlinear Term: Self‑interaction, enabling stable knots/solitons.
- σ(x,t) ⋅ FR(C[Ψ]) — Source Term: Coupling to matter/energy distributions and spinor configurations.
📐 The updated homogeneous equation:
(d²Φ/dt² = c² ∇² Φ − μ Φ + β Φ³)
- d²Φ/dt² — Inertial Term: Vacuum inertia, giving solitons measurable resistance to acceleration.
- c² ∇² Φ — Elastic Term: Dispersion and finite‑speed propagation.
- − μ Φ — Linear Restoring Term: Background elasticity, ensuring equilibrium.
- + β Φ³ — Nonlinear Term: Self‑focusing, balancing dispersion to form stable particles.
🔎 Homogeneous vs. Sourced
- Original: Includes explicit source term σ(x,t) ⋅ FR(C[Ψ]).
- Updated: Source removed, equation set equal to 0, with added − μ Φ term.
- Field content: Original couples to spinor functional C[Ψ]; updated treats Φ as a scalar field.
⚙️ Mapping Conditions
- Vacuum case: Set σ(x,t) ⋅ FR(C[Ψ]) = 0. Then original reduces to (∂t² S − c² ∇² S + β S³ = 0).
- This matches updated form if μ = 0 and S ↔ Φ.
- General inhomogeneous form: d²Φ/dt² − c² ∇² Φ − μ Φ + β Φ³ = J(x,t), with J(x,t) = σ(x,t) ⋅ FR(C[Ψ]).
✅ Takeaway
The original equation emphasized external coupling to spinor states, while the updated form highlights internal stability with a linear restoring term. By mapping terms and conditions, the two can be reconciled: one as a sourced, spinor‑coupled model, the other as a homogeneous scalar field equation. This evolution shows how RST adapts from external interactions to intrinsic mechanics.
| Original RST Equation | Updated RST Equation |
|---|---|
| (∂t² S − c² ∇² S + β S³) = σ(x,t) ⋅ FR(C[Ψ]) | d²Φ/dt² = c² ∇² Φ − μ Φ + β Φ³ |
| Source term present: σ(x,t) ⋅ FR(C[Ψ]) couples Substrate to external matter/energy and spinor states. | No source term: Equation is homogeneous, set equal to 0. |
| No linear restoring term: Stability comes only from nonlinear self‑interaction (β S³) and external sources. | Includes − μ Φ: Background elasticity, ensures equilibrium and rest energy. |
| Field content: S couples to spinor functional C[Ψ], allowing richer topological/spinor behavior. | Field content: Φ treated as a scalar field, simplified dynamics without explicit spinor coupling. |
| Interpretation: Substrate dynamics are driven by external coupling and nonlinear self‑interaction. | Interpretation: Substrate evolves internally with built‑in restoring force and self‑focusing. |
| Vacuum case: If σ(x,t) ⋅ FR(C[Ψ]) = 0, reduces to (∂t² S − c² ∇² S + β S³ = 0). | Equivalence: Matches original vacuum case if μ = 0 and S ↔ Φ. |