Python Tools for Quantum Error Correction
Frontier decoder for quantum LDPC codes: pruned dynamic programming over boundary states for approximate logical maximum-likelihood decoding of sparse parity-check and detector-error-model matrices.
Deterministic quantum error-correction labs, proof receipts, and reproducible evidence.
Quantum circuit simulator (state vector, MPS, stabilizer; CPU, CUDA, Metal) and QEC decoders (MWPM, Union-Find, BP-OSD, relay-BP) with a CUDA-Q QEC plugin and open FPGA relay-BP RTL
Vendor-portable GPU decoders for quantum LDPC codes — Triton min-sum BP & Relay-BP on NVIDIA (CUDA), AMD (ROCm), and Apple-silicon (Metal), consuming any stim DetectorErrorModel.
C++/HLS qLDPC decoder scaffold: CMake + Catch2 + GF(2) micro-benchmark, Vitis HLS/Vivado/PetaLinux scripts for ZCU111. BP kernel and HIL verification are placeholders; hardware results UNRUN.
Checkable distance certificates for quantum error correction
This repository contains a few asymptotically good qLDPC code construction (HGP and LP codes).
Open-source QEC decoders: Pathfinder — a direction-aware neural surface-code decoder (real-time-budget Triton kernel) whose multi-seed ensemble lowers logical error below the prior open-source GNN at operational noise rates — plus a kernel-grounded, MLE-anchored latency–LER benchmark for circuit-level qLDPC (bivariate-bicycle) codes.
Reproducible Fourier neural operator experiments for cyclic quantum LDPC decoding with Stim and BP-LSD
Construct bivariate-bicycle / generalized-bicycle qLDPC codes and decode them with a from-scratch BP+OSD decoder, benchmarked against the surface code on encoding rate.
CoDecoder: a small neural frontend that decodes confident shots itself and routes the rest to an unchanged strong QEC decoder (correlated matching, Relay-BP, Cascade), making decoding faster and more accurate. Training code, trained weights, circuits and test records of the paper.
ML erasure decoding of QLDPC codes with dual (stabilizer) peeling + inactivation — ISIT 2026
Proven distance-12 single-ancilla syndrome circuit for the gross code [[144,12,12]] — code, data, paper and the full AI-native research record
Certified exact distances for six PBB codes: signed certificates, inline witnesses, one-command verifier, and a forgery-laden stranger-verification challenge
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