{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:ZRZB6NXIS2ZZ4NM5DC5XGJCSIZ","short_pith_number":"pith:ZRZB6NXI","canonical_record":{"source":{"id":"2308.07915","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-08-15T17:55:12Z","cross_cats_sorted":["cs.ET"],"title_canon_sha256":"575f2d791ffb0b26f40c39e3b6defd24403e3c69aba8f9cfbe12b88fb0f5f1ab","abstract_canon_sha256":"63ce60ef392406ff3aaea17c3d245e8ada1b541065fb7d4e5d30753e9403f063"},"schema_version":"1.0"},"canonical_sha256":"cc721f36e896b39e359d18bb732452466f2720b2f3770645fb70297639805d0b","source":{"kind":"arxiv","id":"2308.07915","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2308.07915","created_at":"2026-07-05T08:16:07Z"},{"alias_kind":"arxiv_version","alias_value":"2308.07915v2","created_at":"2026-07-05T08:16:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2308.07915","created_at":"2026-07-05T08:16:07Z"},{"alias_kind":"pith_short_12","alias_value":"ZRZB6NXIS2ZZ","created_at":"2026-07-05T08:16:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZRZB6NXIS2ZZ4NM5","created_at":"2026-07-05T08:16:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZRZB6NXI","created_at":"2026-07-05T08:16:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:ZRZB6NXIS2ZZ4NM5DC5XGJCSIZ","target":"record","payload":{"canonical_record":{"source":{"id":"2308.07915","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-08-15T17:55:12Z","cross_cats_sorted":["cs.ET"],"title_canon_sha256":"575f2d791ffb0b26f40c39e3b6defd24403e3c69aba8f9cfbe12b88fb0f5f1ab","abstract_canon_sha256":"63ce60ef392406ff3aaea17c3d245e8ada1b541065fb7d4e5d30753e9403f063"},"schema_version":"1.0"},"canonical_sha256":"cc721f36e896b39e359d18bb732452466f2720b2f3770645fb70297639805d0b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:16:07.447246Z","signature_b64":"5VDcIlzesKt5jlB9PsBmk2EEr9leW4gh0L8qa0ivqPkVg0gG7nNRZbRNP3P20dBx3GZf0s5/XQj38S/oS0KFBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cc721f36e896b39e359d18bb732452466f2720b2f3770645fb70297639805d0b","last_reissued_at":"2026-07-05T08:16:07.446740Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:16:07.446740Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2308.07915","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T08:16:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"k9hPaHAmHA+kGnqe9YNgfuHJZ2nCZHiADjBrbR3rwtYGva3FFKZ7584WV2DkB1y9fmo8Fv5mioKUDzYZ5BbCCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T06:14:53.713370Z"},"content_sha256":"cb5311a5009167d6fbc62783415784fab2ff7b1fc420f0e91c1bdbca7f046692","schema_version":"1.0","event_id":"sha256:cb5311a5009167d6fbc62783415784fab2ff7b1fc420f0e91c1bdbca7f046692"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:ZRZB6NXIS2ZZ4NM5DC5XGJCSIZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"High-threshold and low-overhead fault-tolerant quantum memory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.ET"],"primary_cat":"quant-ph","authors_text":"Andrew W. Cross, Dmitri Maslov, Jay M. Gambetta, Patrick Rall, Sergey Bravyi, Theodore J. Yoder","submitted_at":"2023-08-15T17:55:12Z","abstract_excerpt":"Quantum error correction becomes a practical possibility only if the physical error rate is below a threshold value that depends on a particular quantum code, syndrome measurement circuit, and decoding algorithm. Here we present an end-to-end quantum error correction protocol that implements fault-tolerant memory based on a family of LDPC codes with a high encoding rate that achieves an error threshold of $0.8\\%$ for the standard circuit-based noise model. This is on par with the surface code which has remained an uncontested leader in terms of its high error threshold for nearly 20 years. The"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2308.07915","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2308.07915/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T08:16:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1L0srv9FzSj3BMQ4Dwi2ADlk2C+Dima3k9tLe5VQ6Xtj8IJZDFx1Z9Y5dXAF0vNKPcHry+13s4sRL9cMebkbAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T06:14:53.713863Z"},"content_sha256":"a11f9eda80603fa9aead65da50692bbe0e08bc0a821dd20ca81cc110ad6b8ab8","schema_version":"1.0","event_id":"sha256:a11f9eda80603fa9aead65da50692bbe0e08bc0a821dd20ca81cc110ad6b8ab8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZRZB6NXIS2ZZ4NM5DC5XGJCSIZ/bundle.json","state_url":"https://pith.science/pith/ZRZB6NXIS2ZZ4NM5DC5XGJCSIZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZRZB6NXIS2ZZ4NM5DC5XGJCSIZ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-05T06:14:53Z","links":{"resolver":"https://pith.science/pith/ZRZB6NXIS2ZZ4NM5DC5XGJCSIZ","bundle":"https://pith.science/pith/ZRZB6NXIS2ZZ4NM5DC5XGJCSIZ/bundle.json","state":"https://pith.science/pith/ZRZB6NXIS2ZZ4NM5DC5XGJCSIZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZRZB6NXIS2ZZ4NM5DC5XGJCSIZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:ZRZB6NXIS2ZZ4NM5DC5XGJCSIZ","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":"63ce60ef392406ff3aaea17c3d245e8ada1b541065fb7d4e5d30753e9403f063","cross_cats_sorted":["cs.ET"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-08-15T17:55:12Z","title_canon_sha256":"575f2d791ffb0b26f40c39e3b6defd24403e3c69aba8f9cfbe12b88fb0f5f1ab"},"schema_version":"1.0","source":{"id":"2308.07915","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2308.07915","created_at":"2026-07-05T08:16:07Z"},{"alias_kind":"arxiv_version","alias_value":"2308.07915v2","created_at":"2026-07-05T08:16:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2308.07915","created_at":"2026-07-05T08:16:07Z"},{"alias_kind":"pith_short_12","alias_value":"ZRZB6NXIS2ZZ","created_at":"2026-07-05T08:16:07Z"},{"alias_kind":"pith_short_16","alias_value":"ZRZB6NXIS2ZZ4NM5","created_at":"2026-07-05T08:16:07Z"},{"alias_kind":"pith_short_8","alias_value":"ZRZB6NXI","created_at":"2026-07-05T08:16:07Z"}],"graph_snapshots":[{"event_id":"sha256:a11f9eda80603fa9aead65da50692bbe0e08bc0a821dd20ca81cc110ad6b8ab8","target":"graph","created_at":"2026-07-05T08:16:07Z","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/2308.07915/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum error correction becomes a practical possibility only if the physical error rate is below a threshold value that depends on a particular quantum code, syndrome measurement circuit, and decoding algorithm. Here we present an end-to-end quantum error correction protocol that implements fault-tolerant memory based on a family of LDPC codes with a high encoding rate that achieves an error threshold of $0.8\\%$ for the standard circuit-based noise model. This is on par with the surface code which has remained an uncontested leader in terms of its high error threshold for nearly 20 years. The","authors_text":"Andrew W. Cross, Dmitri Maslov, Jay M. Gambetta, Patrick Rall, Sergey Bravyi, Theodore J. Yoder","cross_cats":["cs.ET"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-08-15T17:55:12Z","title":"High-threshold and low-overhead fault-tolerant quantum memory"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2308.07915","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:cb5311a5009167d6fbc62783415784fab2ff7b1fc420f0e91c1bdbca7f046692","target":"record","created_at":"2026-07-05T08:16:07Z","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":"63ce60ef392406ff3aaea17c3d245e8ada1b541065fb7d4e5d30753e9403f063","cross_cats_sorted":["cs.ET"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2023-08-15T17:55:12Z","title_canon_sha256":"575f2d791ffb0b26f40c39e3b6defd24403e3c69aba8f9cfbe12b88fb0f5f1ab"},"schema_version":"1.0","source":{"id":"2308.07915","kind":"arxiv","version":2}},"canonical_sha256":"cc721f36e896b39e359d18bb732452466f2720b2f3770645fb70297639805d0b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cc721f36e896b39e359d18bb732452466f2720b2f3770645fb70297639805d0b","first_computed_at":"2026-07-05T08:16:07.446740Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:16:07.446740Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5VDcIlzesKt5jlB9PsBmk2EEr9leW4gh0L8qa0ivqPkVg0gG7nNRZbRNP3P20dBx3GZf0s5/XQj38S/oS0KFBg==","signature_status":"signed_v1","signed_at":"2026-07-05T08:16:07.447246Z","signed_message":"canonical_sha256_bytes"},"source_id":"2308.07915","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cb5311a5009167d6fbc62783415784fab2ff7b1fc420f0e91c1bdbca7f046692","sha256:a11f9eda80603fa9aead65da50692bbe0e08bc0a821dd20ca81cc110ad6b8ab8"],"state_sha256":"7866b1965f0b74a723cbde3ff69918c38d0cfdd05f013d82d01de36c37ef87e8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pPD5XFjbWaNb9tcHN97O8dfM+ynfKLXqqCzx8TdI9N1q/JG1SX1RA/jmQzDw8ood5xwNwPD2qmDQSPY2zzzKBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T06:14:53.718561Z","bundle_sha256":"d1c988d3bef32267b2550b9c3969425d80b29d9ad5051a67bf679266f07ba4af"}}