{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:UNUJOE5JOOWA7CMRUIY6SBFCU4","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"0146cee1127c04a1d6452be7a502029029fb9e3782297ebcf7dc41fab1332c10","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-05-27T12:10:37Z","title_canon_sha256":"66160d5cd040f1bcf9815f21c4150e5c296433b370bc624cf44a7543637e186e"},"schema_version":"1.0","source":{"id":"2105.13082","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2105.13082","created_at":"2026-07-05T02:57:22Z"},{"alias_kind":"arxiv_version","alias_value":"2105.13082v2","created_at":"2026-07-05T02:57:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2105.13082","created_at":"2026-07-05T02:57:22Z"},{"alias_kind":"pith_short_12","alias_value":"UNUJOE5JOOWA","created_at":"2026-07-05T02:57:22Z"},{"alias_kind":"pith_short_16","alias_value":"UNUJOE5JOOWA7CMR","created_at":"2026-07-05T02:57:22Z"},{"alias_kind":"pith_short_8","alias_value":"UNUJOE5J","created_at":"2026-07-05T02:57:22Z"}],"graph_snapshots":[{"event_id":"sha256:6bfe1b9ef82801bdc0342eff3874a6d542379d42a1665b221d215cc770067f36","target":"graph","created_at":"2026-07-05T02:57:22Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2105.13082/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper introduces PyMatching, a fast open-source Python package for decoding quantum error-correcting codes with the minimum-weight perfect matching (MWPM) algorithm. PyMatching includes the standard MWPM decoder as well as a variant, which we call local matching, that restricts each syndrome defect to be matched to another defect within a local neighbourhood. The decoding performance of local matching is almost identical to that of the standard MWPM decoder in practice, while reducing the computational complexity approximately quadratically. We benchmark the performance of PyMatching, sho","authors_text":"Oscar Higgott","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-05-27T12:10:37Z","title":"PyMatching: A Python package for decoding quantum codes with minimum-weight perfect matching"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2105.13082","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:0d84e4485c2deaf8072d5b9f25ded4b6a58ec6c3bb74cb1f99f542c7f4da4c25","target":"record","created_at":"2026-07-05T02:57:22Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"0146cee1127c04a1d6452be7a502029029fb9e3782297ebcf7dc41fab1332c10","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2021-05-27T12:10:37Z","title_canon_sha256":"66160d5cd040f1bcf9815f21c4150e5c296433b370bc624cf44a7543637e186e"},"schema_version":"1.0","source":{"id":"2105.13082","kind":"arxiv","version":2}},"canonical_sha256":"a3689713a973ac0f8991a231e904a2a7237d5a0549d3fbc035d148e22447c078","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a3689713a973ac0f8991a231e904a2a7237d5a0549d3fbc035d148e22447c078","first_computed_at":"2026-07-05T02:57:22.187429Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:57:22.187429Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WZ/XNHMObQpOQEtYckIT6KbpFvMuOjSCMjfPZZ/sZ0/Q41IxCmlPU+y+BacXgbB8u1xlOEAdiR2+E8mdcTN9Dw==","signature_status":"signed_v1","signed_at":"2026-07-05T02:57:22.187921Z","signed_message":"canonical_sha256_bytes"},"source_id":"2105.13082","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0d84e4485c2deaf8072d5b9f25ded4b6a58ec6c3bb74cb1f99f542c7f4da4c25","sha256:6bfe1b9ef82801bdc0342eff3874a6d542379d42a1665b221d215cc770067f36"],"state_sha256":"04c10fbf00fa539c52ba24c3944cec7e752e96a2dfaa0daa23e3466643866168"}