Double-Slit

Each dot is one particle landing on the screen. The interference pattern is not in any single dot: it builds up statistically, exactly as the Born rule says. Turn up the observer strength D and which-path information grows while fringe visibility V falls, obeying Englert's bound D² + V² ≤ 1. The cyan curve is the theoretical |ψ(y)|².

Moving the D slider means choosing a different experimental setup and restarting: not time travel. Each particle still collapses to one point; only the statistics change, and the Born rule holds throughout. Constants from the cascade: ℏ = 1.0546×10⁻³⁴ J·s, c = 2.9979×10⁸ m/s, e = 1.6022×10⁻¹⁹ C, m_e = 0.5110 MeV. No magic numbers.

Part of the sigma-ground physics work. The simulation runs entirely in your browser; nothing is sent anywhere.