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About this paper
Daniel Barter, Jacob C. Bridgeman, Chris Dawson, Terry Farrelly, Shane Fleming, Mercedes Gimeno-Segovia, Paul Hartke, Timothy Hein and 7 more
PRISM decodes quantum error-correction measurements using parity-check outcomes and known erasure locations. It shares information only along edges of the code’s check graph and votes across equivalent logical-membrane representatives. In simulations, it tracks conventional decoders across several protocols, with lower logical error rates at lower operating points. For distance-8 LLD, reported latency is 6.59 microseconds, derived from layer-level 400 MHz timing; full FPGA mapping was at 250 MHz.
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