Pathfinder-BP decoder achieves minimum-weight perfect matching performance on surface codes with quasi-linear latency scaling. Its parallel architecture enables real-time hardware implementation without matrix inversion.

Pathfinder-BP decoder achieves minimum-weight perfect matching performance on surface codes with quasi-linear latency scaling. Its parallel architecture enables real-time hardware implementation without matrix inversion.
First 2D fault-tolerant quantum computer using local decoding with constant classical resources. Cellular automaton decoder eliminates need for centralized global decoder, paving path for practical large-scale quantum computation.