{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:MW4256KHC5ECL5R6DOAWOMNEAV","short_pith_number":"pith:MW4256KH","canonical_record":{"source":{"id":"1706.02445","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-06-08T03:31:09Z","cross_cats_sorted":[],"title_canon_sha256":"726349345846ad0b3e83a340b1f8bf029dcdf05a05d816542f9806e593458710","abstract_canon_sha256":"0ac43bce5a75c9b398bba7d8a4cd39b635003d1f89d604cc7f17ce809e0a9cc9"},"schema_version":"1.0"},"canonical_sha256":"65b9aef947174825f63e1b816731a405528bb1caa2075fdef30c980230712b7e","source":{"kind":"arxiv","id":"1706.02445","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.02445","created_at":"2026-05-18T00:24:35Z"},{"alias_kind":"arxiv_version","alias_value":"1706.02445v2","created_at":"2026-05-18T00:24:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.02445","created_at":"2026-05-18T00:24:35Z"},{"alias_kind":"pith_short_12","alias_value":"MW4256KHC5EC","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"MW4256KHC5ECL5R6","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"MW4256KH","created_at":"2026-05-18T12:31:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:MW4256KHC5ECL5R6DOAWOMNEAV","target":"record","payload":{"canonical_record":{"source":{"id":"1706.02445","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-06-08T03:31:09Z","cross_cats_sorted":[],"title_canon_sha256":"726349345846ad0b3e83a340b1f8bf029dcdf05a05d816542f9806e593458710","abstract_canon_sha256":"0ac43bce5a75c9b398bba7d8a4cd39b635003d1f89d604cc7f17ce809e0a9cc9"},"schema_version":"1.0"},"canonical_sha256":"65b9aef947174825f63e1b816731a405528bb1caa2075fdef30c980230712b7e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:24:35.339008Z","signature_b64":"aouzRO3UNwqIu3nue0e3uwx9KRRIAFhfrCxj8yNybb6WWWzqrD/WF7Hv+7nmOtf4gi1/mR5LBxt8VWW2mMobAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"65b9aef947174825f63e1b816731a405528bb1caa2075fdef30c980230712b7e","last_reissued_at":"2026-05-18T00:24:35.338601Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:24:35.338601Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1706.02445","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":"2026-05-18T00:24:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"o+RGJwHkUkizpoHRooF9t3HvjKJeiC7DSkxpLUgy34EyTEJUtTe983eu9l+91jkKTjbKW8th8iJ5VKFGRgMFCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T09:02:02.090727Z"},"content_sha256":"e2844651909abbbca777d93bfc1c93cf34982ccc417aee2aade2a64d58d4bffd","schema_version":"1.0","event_id":"sha256:e2844651909abbbca777d93bfc1c93cf34982ccc417aee2aade2a64d58d4bffd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:MW4256KHC5ECL5R6DOAWOMNEAV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Achieving the Heisenberg limit in quantum metrology using quantum error correction","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"John Preskill, Liang Jiang, Mengzhen Zhang, Sisi Zhou","submitted_at":"2017-06-08T03:31:09Z","abstract_excerpt":"Quantum metrology has many important applications in science and technology, ranging from frequency spectroscopy to gravitational wave detection. Quantum mechanics imposes a fundamental limit on measurement precision, called the Heisenberg limit, which can be achieved for noiseless quantum systems, but is not achievable in general for systems subject to noise. Here we study how measurement precision can be enhanced through quantum error correction, a general method for protecting a quantum system from the damaging effects of noise. We find a necessary and sufficient condition for achieving the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.02445","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":""},"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":"2026-05-18T00:24:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HneTsL0oz6Yq9uACF1BRzZTQvyUQx6wKOPukpZahNBxuFcJZTaLqSwCt1MHBFVrPBRomgTqm0uQo6qfQ2phvAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T09:02:02.091079Z"},"content_sha256":"4adffe4cefdb827c774b5c7508c171d0fd5e1439b388c27ab981c246ca3edaea","schema_version":"1.0","event_id":"sha256:4adffe4cefdb827c774b5c7508c171d0fd5e1439b388c27ab981c246ca3edaea"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MW4256KHC5ECL5R6DOAWOMNEAV/bundle.json","state_url":"https://pith.science/pith/MW4256KHC5ECL5R6DOAWOMNEAV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MW4256KHC5ECL5R6DOAWOMNEAV/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":"2026-05-21T09:02:02Z","links":{"resolver":"https://pith.science/pith/MW4256KHC5ECL5R6DOAWOMNEAV","bundle":"https://pith.science/pith/MW4256KHC5ECL5R6DOAWOMNEAV/bundle.json","state":"https://pith.science/pith/MW4256KHC5ECL5R6DOAWOMNEAV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MW4256KHC5ECL5R6DOAWOMNEAV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:MW4256KHC5ECL5R6DOAWOMNEAV","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":"0ac43bce5a75c9b398bba7d8a4cd39b635003d1f89d604cc7f17ce809e0a9cc9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-06-08T03:31:09Z","title_canon_sha256":"726349345846ad0b3e83a340b1f8bf029dcdf05a05d816542f9806e593458710"},"schema_version":"1.0","source":{"id":"1706.02445","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1706.02445","created_at":"2026-05-18T00:24:35Z"},{"alias_kind":"arxiv_version","alias_value":"1706.02445v2","created_at":"2026-05-18T00:24:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1706.02445","created_at":"2026-05-18T00:24:35Z"},{"alias_kind":"pith_short_12","alias_value":"MW4256KHC5EC","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_16","alias_value":"MW4256KHC5ECL5R6","created_at":"2026-05-18T12:31:31Z"},{"alias_kind":"pith_short_8","alias_value":"MW4256KH","created_at":"2026-05-18T12:31:31Z"}],"graph_snapshots":[{"event_id":"sha256:4adffe4cefdb827c774b5c7508c171d0fd5e1439b388c27ab981c246ca3edaea","target":"graph","created_at":"2026-05-18T00:24:35Z","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":"Quantum metrology has many important applications in science and technology, ranging from frequency spectroscopy to gravitational wave detection. Quantum mechanics imposes a fundamental limit on measurement precision, called the Heisenberg limit, which can be achieved for noiseless quantum systems, but is not achievable in general for systems subject to noise. Here we study how measurement precision can be enhanced through quantum error correction, a general method for protecting a quantum system from the damaging effects of noise. We find a necessary and sufficient condition for achieving the","authors_text":"John Preskill, Liang Jiang, Mengzhen Zhang, Sisi Zhou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-06-08T03:31:09Z","title":"Achieving the Heisenberg limit in quantum metrology using quantum error correction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1706.02445","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:e2844651909abbbca777d93bfc1c93cf34982ccc417aee2aade2a64d58d4bffd","target":"record","created_at":"2026-05-18T00:24:35Z","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":"0ac43bce5a75c9b398bba7d8a4cd39b635003d1f89d604cc7f17ce809e0a9cc9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2017-06-08T03:31:09Z","title_canon_sha256":"726349345846ad0b3e83a340b1f8bf029dcdf05a05d816542f9806e593458710"},"schema_version":"1.0","source":{"id":"1706.02445","kind":"arxiv","version":2}},"canonical_sha256":"65b9aef947174825f63e1b816731a405528bb1caa2075fdef30c980230712b7e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"65b9aef947174825f63e1b816731a405528bb1caa2075fdef30c980230712b7e","first_computed_at":"2026-05-18T00:24:35.338601Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:24:35.338601Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aouzRO3UNwqIu3nue0e3uwx9KRRIAFhfrCxj8yNybb6WWWzqrD/WF7Hv+7nmOtf4gi1/mR5LBxt8VWW2mMobAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:24:35.339008Z","signed_message":"canonical_sha256_bytes"},"source_id":"1706.02445","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e2844651909abbbca777d93bfc1c93cf34982ccc417aee2aade2a64d58d4bffd","sha256:4adffe4cefdb827c774b5c7508c171d0fd5e1439b388c27ab981c246ca3edaea"],"state_sha256":"b3060aa052b9df6799357953992418e9a3c9673b9d933b37f6c5483542b1ea3f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"i/ZLRZgvzXJyT/LXqgKxCYulns88wID6e80IUOviUP4mLogaFLaE9ip9W0ba1yE2rG8jPCClWyWbWYvJlY0eAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T09:02:02.093059Z","bundle_sha256":"f2de67ebbf9bbe4a124ab78bddcde54d4005f13897a5133c1bbc5d872599eabe"}}