An iterative reweighting decoder for surface codes uses X-Z error correlations from circuit-level noise, improving logical error rates and raising the threshold from about 1% to 1.16%.
To support reweighting, we propose a systematic method for constructing the conditional probabilities of these cor- related events
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Enhancing Fault-Tolerant Surface Code Decoding with Iterative Lattice Reweighting
An iterative reweighting decoder for surface codes uses X-Z error correlations from circuit-level noise, improving logical error rates and raising the threshold from about 1% to 1.16%.