Retrocausal Branch Stabilization in Quantum Systems: A Simulation of Time-Travel Seeding and Multiverse Pruning Description This simulation investigates whether the emergence of time-travel technology within a quantum branch can serve as a retrocausal stabilizing anchor, reinforcing its own persistence and influencing the trajectory of other branches across the multiverse. The study tests a hypothesis that once time-travel emerges in any branch, it produces a self-reinforcing feedback effect, suppressing alternatives and promoting global stabilization through deterministic branch selection. Research Question Is it possible for a single "time-technology-enabled" quantum branch to retroactively and laterally reinforce its own survival, effectively pruning the multiverse and favoring deterministic branch selection? This work builds on recursive correction engines from prior simulations of decoherence, classical emergence, and time's arrow. It extends the model to include retroactive energy gradients, simulating the influence of a seeded technological anomaly across possible quantum outcomes using rigorous split-step Fourier methods. Mathematical Framework Modified Schrödinger Equation The system evolves under a modified time-dependent Schrödinger equation: iℏ∂Ψ(x,t)/∂t = [T̂ + V(x) + V_corr(x,t) + V_retro(x,t)]Ψ(x,t) Where: - T̂ = -ℏ²/(2m)∇²: Kinetic energy operator - V(x) = 0.25x⁴ - 2x²: Symmetric double-well potential with: - Two minima at x = ±2√2 ≈ ±2.83 (V_min = -4) - Central barrier at x = 0 (V_max = 0) - Barrier height: ΔV = 4 energy units - V_corr(x,t) = -λ(x - ⟨x⟩_t): Recursive correction potential (λ = 0.02) - V_retro(x,t) = -γ(x - x_anchor): Retrocausal feedback potential (γ = 0.03) Split-Step Fourier Evolution The time evolution is implemented using the split-step method: 1. Half potential step: ψ(x,t+dt/2) = exp(-iV(x)dt/2ℏ)ψ(x,t) 2. Momentum space evolution: ψ̃(k,t+dt) = exp(-iℏk²dt/2m)FFT[ψ(x,t+dt/2)] 3. Final potential step: ψ(x,t+dt) = exp(-iV(x)dt/2ℏ)IFFT[ψ̃(k,t+dt)] Retrocausal Trigger Mechanism Time-travel seeding occurs when the central branch probability exceeds threshold: P_center(t) = ∫_{-3}^{3} |Ψ(x,t)|² dx > θ (θ = 0.10) Upon triggering: - Anchor position x_anchor is locked to the current probability peak - Retrocausal potential V_retro becomes active for all subsequent evolution - Creates self-reinforcing feedback loop Quantum Information Measures Shannon Entropy H(t) = -∑_i p_i log₂(p_i) where p_i = |Ψ(x_i,t)|² Branch Probability Analysis The spatial domain is partitioned into three regions: - Left branch: x 3 Branch probabilities calculated as: P_L(t) = ∫_{-∞}^{-3} |Ψ(x,t)|² dx P_C(t) = ∫_{-3}^{3} |Ψ(x,t)|² dx P_R(t) = ∫_{3}^{∞} |Ψ(x,t)|² dx Simulation Parameters - Grid: 512 points over [-10, 10] - Time evolution: 1000 steps, dt = 0.005 (total time = 5.0 units) - Physical constants: m = 1.0, ℏ = 1.0 (dimensionless units) - Feedback strengths: λ = 0.02, γ = 0.03 - Initial state: Normalized Gaussian wave packet ψ₀(x) = exp(-x²) Key Findings Retrocausal Event Confirmation - Status: TIME-TRAVEL SEEDING OCCURRED - Anchor position: x = -0.0196 - Physical interpretation: Future time-travel technology successfully stabilized the quantum branch Quantum Information Analysis - Initial Shannon entropy: 5.7225 bits - Final Shannon entropy: 6.9730 bits - Net entropy change: +1.2505 bits - Interpretation: Despite entropy increase, probability concentrated in center branch (apparent paradox resolved by retrocausal localization) Multiverse Branch Analysis Final branch probabilities: - Center branch: 99.26% (dominant) - Left branch: 0.16% (suppressed) - Right branch: 0.38% (suppressed) Result: Effective pruning of 99.4% of alternative quantum realities. Critical Observations 1. Successful Retrocausal Stabilization: Once triggered, the time-travel anchor created a feedback loop that reinforced its own existence 2. Multiverse Pruning: Alternative branches were suppressed to <1% probability each 3. Entropy Paradox: Global entropy increased while probability became highly localized, demonstrating complex retrocausal dynamics 4. Deterministic Emergence: The system evolved from quantum superposition to near-deterministic single-branch dominance Physical Interpretation The simulation demonstrates that time-travel technology can act as a quantum anchor, producing retrocausal feedback that favors deterministic outcomes across branches. Once the center branch exceeded the probability threshold, it triggered the emergence of time-travel technology, which then influenced its own past evolution through the retrocausal potential term. This creates a self-consistent causal loop where: 1. Quantum evolution allows multiple branches to develop 2. One branch achieves sufficient probability to develop time-travel 3. Time-travel technology retroactively stabilizes its own timeline 4. Alternative branches are suppressed through interference effects 5. The multiverse effectively "prunes" itself to a single dominant reality Conclusion The simulation provides computational evidence supporting the hypothesis that time-travel technology can serve as a retrocausal quantum anchor, producing deterministic branch selection within a Many-Worlds framework. Key results: - 99.26% branch consolidation achieved through retrocausal feedback - Self-reinforcing causality demonstrated through successful anchor establishment - Multiverse pruning accomplished while maintaining quantum mechanical consistency - Deterministic emergence from initially probabilistic quantum superposition This model suggests that technological anomalies capable of retrocausal influence may naturally lead to multiverse pruning and single-branch dominance, offering a potential resolution to the measurement problem through technological rather than observational mechanisms.