Clocked QCA Pipeline — Four-Phase Adiabatic Switching

Quantum-dot cellular automata compute with electrostatic polarization instead of current, but a real QCA wire also needs a clock to move data and recover energy. This simulator renders a line of four-dot cells split into repeating zones, each driven by a clock signal offset 90° from its neighbor through the Switch → Hold → Release → Relax cycle. Flip the driver bit and watch the two electrons of each cell slide between diagonals only while their zone's tunneling barrier is low, latching a quarter cycle later and handing the state on to the next zone — a genuine adiabatic pipeline, not an instantaneous relaxation. Live readouts track elapsed clock cycles, the driver's input bit and the settling output polarization at the far end of the wire.