Papers › Cellular-automaton decoders with provable thresholds for topological codes

Cellular-automaton decoders with provable thresholds for topological codes

26 Sep 2018arXiv:1809.10145links table onlyarchive 2025-07-28

Aleksander Kubica, John Preskill

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We propose a new cellular automaton (CA), the Sweep Rule, which generalizes Toom's rule to any locally Euclidean lattice. We use the Sweep Rule to design a local decoder for the toric code in d≥3 dimensions, the Sweep Decoder, and rigorously establish a lower bound on its performance. We also numerically estimate the Sweep Decoder threshold for the three-dimensional toric code on the cubic and body-centered cubic lattices for phenomenological phase-flip noise. Our results lead to new CA decoders with provable error-correction thresholds for other topological quantum codes including the color code.

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