{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:XN2GMY6UPRXCOQNCMUZYZDK4OJ","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":"4f468fc5fc433ff3e268ab03bd1f0a522bc5a572883496ab41b1aacf5bab69d2","cross_cats_sorted":["cond-mat.stat-mech","math-ph","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-05-11T05:11:12Z","title_canon_sha256":"838edd9a824cb63f5f05853ef216e00077e68637c5c54ddea314503df606c5a3"},"schema_version":"1.0","source":{"id":"0905.1542","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0905.1542","created_at":"2026-05-18T04:01:26Z"},{"alias_kind":"arxiv_version","alias_value":"0905.1542v3","created_at":"2026-05-18T04:01:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0905.1542","created_at":"2026-05-18T04:01:26Z"},{"alias_kind":"pith_short_12","alias_value":"XN2GMY6UPRXC","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_16","alias_value":"XN2GMY6UPRXCOQNC","created_at":"2026-05-18T12:26:02Z"},{"alias_kind":"pith_short_8","alias_value":"XN2GMY6U","created_at":"2026-05-18T12:26:02Z"}],"graph_snapshots":[{"event_id":"sha256:32da64356d3bcf13db72a48e66428aa5f51e42f1b625ed13ad20315b892eb6df","target":"graph","created_at":"2026-05-18T04:01:26Z","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"},"paper":{"abstract_excerpt":"Topological error correction--a novel method to actively correct errors based on cluster states with topological properties--has the highest order of tolerable error rates known to date (10^{-2}). Moreover, the scheme requires only nearest-neighbour interaction, particularly suitable for most physical systems. Here we report the first experimental demonstration of topological error correction with an 8-qubit optical cluster state. In the experiment, it is shown that a correlation can be protected against a single error on any single qubit. In addition, when all qubits are simultaneously subjec","authors_text":"Austin G. Fowler, Chao-Yang Lu, Cheng-Zhi Peng, He Lu, Jian-Wei Pan, Ping Xu, Robert Raussendorf, Wei-Bo Gao, Xing-Can Yao, Youjin Deng, Zeng-Bing Chen","cross_cats":["cond-mat.stat-mech","math-ph","math.MP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-05-11T05:11:12Z","title":"Experimental demonstration of topological error correction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0905.1542","kind":"arxiv","version":3},"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":"sha256:9d9092d5b0b1eb4b89b416c6909a1b5b73eeb4316e8485a77e77c2e219556704","target":"record","created_at":"2026-05-18T04:01:26Z","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":"4f468fc5fc433ff3e268ab03bd1f0a522bc5a572883496ab41b1aacf5bab69d2","cross_cats_sorted":["cond-mat.stat-mech","math-ph","math.MP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-05-11T05:11:12Z","title_canon_sha256":"838edd9a824cb63f5f05853ef216e00077e68637c5c54ddea314503df606c5a3"},"schema_version":"1.0","source":{"id":"0905.1542","kind":"arxiv","version":3}},"canonical_sha256":"bb746663d47c6e2741a265338c8d5c726cd7c987cb75b6b08430f34025d94abd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bb746663d47c6e2741a265338c8d5c726cd7c987cb75b6b08430f34025d94abd","first_computed_at":"2026-05-18T04:01:26.734412Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:01:26.734412Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"tkSWJ9u0J9FZ3g2eFh3YxJ2zuHbHfuAVHp3ECp2EcvJooue26QGkQW1NShEOeAV8Z4l7dxF5AQn8j0voF31WAg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:01:26.735211Z","signed_message":"canonical_sha256_bytes"},"source_id":"0905.1542","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9d9092d5b0b1eb4b89b416c6909a1b5b73eeb4316e8485a77e77c2e219556704","sha256:32da64356d3bcf13db72a48e66428aa5f51e42f1b625ed13ad20315b892eb6df"],"state_sha256":"9c702e72325149267f1ba5b4cd68844c0097f402777a4a577b6345696619b48a"}