Photonic Interferometer Mesh

Photonic quantum processors compute by routing single photons through a network of Mach–Zehnder interferometers etched onto a chip. Each node mixes two waveguide modes with a tunable split ratio and phase, and chaining enough of them lets the mesh implement any unitary transformation on the light. This simulator models a 4-mode, 6-node triangular mesh: choose which port the photon enters, drag each node's θ (split) and φ (phase) sliders, and watch the live amplitude propagate through the waveguides while the Born-rule probability bars update at the four outputs. It is the same reconfigurable-mesh primitive used for Gaussian boson sampling and cluster-state photonic quantum computing.