Quantum Particle Field: Wavefunction Tunneling Lab (2D)

This 2D companion replaces the orbiting-camera particle-swarm look of the 3D version with the actual quantum mechanics it only gestured at: a Gaussian wavepacket ψ(x,y,t) is evolved on a real grid by numerically integrating the time-dependent Schrödinger equation, launched at a height-controllable potential barrier so you can watch genuine tunneling — probability leaking through a classically forbidden wall — measured live as a transmission percentage, alongside a running Heisenberg uncertainty product and a real projective-measurement "collapse" button.