{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:R66NDQYLJBHSKJ2VJQ53CGRBAB","short_pith_number":"pith:R66NDQYL","canonical_record":{"source":{"id":"1109.4821","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-09-22T14:23:41Z","cross_cats_sorted":[],"title_canon_sha256":"7b898b25de4fe9cab9825abf1389c0e9d16d4997cf9233bd98b1b898b91f7bdc","abstract_canon_sha256":"06e85ccbe07ec5ba8f5b4e2b5b5eedddec837925ed44b245d5f33c106fc29b93"},"schema_version":"1.0"},"canonical_sha256":"8fbcd1c30b484f2527554c3bb11a210050ced8bd9d453ff4be1001490a1fe8fe","source":{"kind":"arxiv","id":"1109.4821","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.4821","created_at":"2026-05-18T04:12:32Z"},{"alias_kind":"arxiv_version","alias_value":"1109.4821v1","created_at":"2026-05-18T04:12:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.4821","created_at":"2026-05-18T04:12:32Z"},{"alias_kind":"pith_short_12","alias_value":"R66NDQYLJBHS","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"R66NDQYLJBHSKJ2V","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"R66NDQYL","created_at":"2026-05-18T12:26:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:R66NDQYLJBHSKJ2VJQ53CGRBAB","target":"record","payload":{"canonical_record":{"source":{"id":"1109.4821","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-09-22T14:23:41Z","cross_cats_sorted":[],"title_canon_sha256":"7b898b25de4fe9cab9825abf1389c0e9d16d4997cf9233bd98b1b898b91f7bdc","abstract_canon_sha256":"06e85ccbe07ec5ba8f5b4e2b5b5eedddec837925ed44b245d5f33c106fc29b93"},"schema_version":"1.0"},"canonical_sha256":"8fbcd1c30b484f2527554c3bb11a210050ced8bd9d453ff4be1001490a1fe8fe","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:12:32.846937Z","signature_b64":"v7/LcSGgRPoql/NKcKEeW7v99af4Si8OqfU9ABcQIQUcZGGNQAknnVSDyfLWxor32wr10odQz7hcTkL3MO0VCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8fbcd1c30b484f2527554c3bb11a210050ced8bd9d453ff4be1001490a1fe8fe","last_reissued_at":"2026-05-18T04:12:32.846517Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:12:32.846517Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1109.4821","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:12:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TETmKCa7kZG7C8BXogyT1xX9i31UrtwX4WC2WgZqM5W3g5X17lSlvgnO6IEDJ3nTj0wW/HkFOFAIQgpOvkNhAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T05:03:42.953175Z"},"content_sha256":"89daeef67f1819241b1c47f93231f5aa94650c94dff72a3339137594b8960a2e","schema_version":"1.0","event_id":"sha256:89daeef67f1819241b1c47f93231f5aa94650c94dff72a3339137594b8960a2e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:R66NDQYLJBHSKJ2VJQ53CGRBAB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental quantum error correction with high fidelity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Dorian Gangloff, Jingfu Zhang, Osama Moussa, Raymond Laflamme","submitted_at":"2011-09-22T14:23:41Z","abstract_excerpt":"More than ten years ago a first step towards quantum error correction (QEC) was implemented [Phys. Rev. Lett. 81, 2152 (1998)]. The work showed there was sufficient control in nuclear magnetic resonance (NMR) to implement QEC, and demonstrated that the error rate changed from $\\epsilon$ to approximatively $\\sim\\epsilon^2$. In the current work we reproduce a similar experiment using control techniques that have been since developed, such as GRAPE pulses. We show that the fidelity of the QEC gate sequence, and the comparative advantage of QEC are appreciably improved. This advantage is maintaine"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.4821","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-18T04:12:32Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KMNe3sNTBM8VQNHHyt6NWgzp2l3V9XpJPahlHYmS5FKLb6GQiobNBg0iAbbXwlk5uO2CRYC1gQm+DgpcSQz7BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T05:03:42.953948Z"},"content_sha256":"ffb64397bd0c9b057776ef3d7a835bcfcfacb0f5e76dc08f87c2fa14ccf9acb1","schema_version":"1.0","event_id":"sha256:ffb64397bd0c9b057776ef3d7a835bcfcfacb0f5e76dc08f87c2fa14ccf9acb1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/R66NDQYLJBHSKJ2VJQ53CGRBAB/bundle.json","state_url":"https://pith.science/pith/R66NDQYLJBHSKJ2VJQ53CGRBAB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/R66NDQYLJBHSKJ2VJQ53CGRBAB/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":"2026-05-26T05:03:42Z","links":{"resolver":"https://pith.science/pith/R66NDQYLJBHSKJ2VJQ53CGRBAB","bundle":"https://pith.science/pith/R66NDQYLJBHSKJ2VJQ53CGRBAB/bundle.json","state":"https://pith.science/pith/R66NDQYLJBHSKJ2VJQ53CGRBAB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/R66NDQYLJBHSKJ2VJQ53CGRBAB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:R66NDQYLJBHSKJ2VJQ53CGRBAB","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":"06e85ccbe07ec5ba8f5b4e2b5b5eedddec837925ed44b245d5f33c106fc29b93","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-09-22T14:23:41Z","title_canon_sha256":"7b898b25de4fe9cab9825abf1389c0e9d16d4997cf9233bd98b1b898b91f7bdc"},"schema_version":"1.0","source":{"id":"1109.4821","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1109.4821","created_at":"2026-05-18T04:12:32Z"},{"alias_kind":"arxiv_version","alias_value":"1109.4821v1","created_at":"2026-05-18T04:12:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1109.4821","created_at":"2026-05-18T04:12:32Z"},{"alias_kind":"pith_short_12","alias_value":"R66NDQYLJBHS","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"R66NDQYLJBHSKJ2V","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"R66NDQYL","created_at":"2026-05-18T12:26:41Z"}],"graph_snapshots":[{"event_id":"sha256:ffb64397bd0c9b057776ef3d7a835bcfcfacb0f5e76dc08f87c2fa14ccf9acb1","target":"graph","created_at":"2026-05-18T04:12:32Z","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":"More than ten years ago a first step towards quantum error correction (QEC) was implemented [Phys. Rev. Lett. 81, 2152 (1998)]. The work showed there was sufficient control in nuclear magnetic resonance (NMR) to implement QEC, and demonstrated that the error rate changed from $\\epsilon$ to approximatively $\\sim\\epsilon^2$. In the current work we reproduce a similar experiment using control techniques that have been since developed, such as GRAPE pulses. We show that the fidelity of the QEC gate sequence, and the comparative advantage of QEC are appreciably improved. This advantage is maintaine","authors_text":"Dorian Gangloff, Jingfu Zhang, Osama Moussa, Raymond Laflamme","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-09-22T14:23:41Z","title":"Experimental quantum error correction with high fidelity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1109.4821","kind":"arxiv","version":1},"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":"sha256:89daeef67f1819241b1c47f93231f5aa94650c94dff72a3339137594b8960a2e","target":"record","created_at":"2026-05-18T04:12:32Z","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":"06e85ccbe07ec5ba8f5b4e2b5b5eedddec837925ed44b245d5f33c106fc29b93","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-09-22T14:23:41Z","title_canon_sha256":"7b898b25de4fe9cab9825abf1389c0e9d16d4997cf9233bd98b1b898b91f7bdc"},"schema_version":"1.0","source":{"id":"1109.4821","kind":"arxiv","version":1}},"canonical_sha256":"8fbcd1c30b484f2527554c3bb11a210050ced8bd9d453ff4be1001490a1fe8fe","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8fbcd1c30b484f2527554c3bb11a210050ced8bd9d453ff4be1001490a1fe8fe","first_computed_at":"2026-05-18T04:12:32.846517Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:12:32.846517Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"v7/LcSGgRPoql/NKcKEeW7v99af4Si8OqfU9ABcQIQUcZGGNQAknnVSDyfLWxor32wr10odQz7hcTkL3MO0VCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T04:12:32.846937Z","signed_message":"canonical_sha256_bytes"},"source_id":"1109.4821","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:89daeef67f1819241b1c47f93231f5aa94650c94dff72a3339137594b8960a2e","sha256:ffb64397bd0c9b057776ef3d7a835bcfcfacb0f5e76dc08f87c2fa14ccf9acb1"],"state_sha256":"d5a620411cfc4ff2f511a759f96006aed715cac472c04e3cd3b6642b64ce7a69"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5TrHAdQ//yHCm7KUoZtmsZ2jTgnjO4j4WWWvJh2BGhF5b16lMM5v20w9E4+aGIXKBpPKLcrHHrE53GT7U2JbDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T05:03:42.957780Z","bundle_sha256":"cec745f66e4d55efddf9e69a119a1b83c8efe4bedadb2cbc69e8b5cd093b3f01"}}