absorb.md

Relaybp Algorithm

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Jay Gambetta
tweet · 2025-10-27
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A few months ago we shared how our Relay-BP algorithm advanced qLDPC decoding. Now we’ve taken the next step—bringing real-time decoding to hardware. We built an FPGA-based Relay-BP decoder for the gross code that fits on a single AMD VU19P and achieves over 8× faster than GPU-based solutions.

FPGA Accelerates Quantum LDPC Decoding