{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:AJQPJF3JZUFXOT4BYNFZSNNIOZ","short_pith_number":"pith:AJQPJF3J","canonical_record":{"source":{"id":"1905.06444","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-05-15T21:40:15Z","cross_cats_sorted":["cond-mat.stat-mech"],"title_canon_sha256":"9c83cee18ac36d07e7f3199755a94085e0515fdc419e3be457a88cdcabc7505a","abstract_canon_sha256":"2dd33b6ec81fa5bce9282c641c1768d9ce789437ad1c984c41ded7f3cd0032b1"},"schema_version":"1.0"},"canonical_sha256":"0260f49769cd0b774f81c34b9935a87648fc4fa0a8857d24945b2b8b5d963ea5","source":{"kind":"arxiv","id":"1905.06444","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.06444","created_at":"2026-07-05T00:40:13Z"},{"alias_kind":"arxiv_version","alias_value":"1905.06444v2","created_at":"2026-07-05T00:40:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.06444","created_at":"2026-07-05T00:40:13Z"},{"alias_kind":"pith_short_12","alias_value":"AJQPJF3JZUFX","created_at":"2026-07-05T00:40:13Z"},{"alias_kind":"pith_short_16","alias_value":"AJQPJF3JZUFXOT4B","created_at":"2026-07-05T00:40:13Z"},{"alias_kind":"pith_short_8","alias_value":"AJQPJF3J","created_at":"2026-07-05T00:40:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:AJQPJF3JZUFXOT4BYNFZSNNIOZ","target":"record","payload":{"canonical_record":{"source":{"id":"1905.06444","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-05-15T21:40:15Z","cross_cats_sorted":["cond-mat.stat-mech"],"title_canon_sha256":"9c83cee18ac36d07e7f3199755a94085e0515fdc419e3be457a88cdcabc7505a","abstract_canon_sha256":"2dd33b6ec81fa5bce9282c641c1768d9ce789437ad1c984c41ded7f3cd0032b1"},"schema_version":"1.0"},"canonical_sha256":"0260f49769cd0b774f81c34b9935a87648fc4fa0a8857d24945b2b8b5d963ea5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:40:13.537040Z","signature_b64":"5B5OshJ5hVaeY2PfL28IXredcZFmwE6XDIO1wOAGIpm8XWnPGHSTLvt05SkjtgV3TrMce4p/rQYec7zSvOlRBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0260f49769cd0b774f81c34b9935a87648fc4fa0a8857d24945b2b8b5d963ea5","last_reissued_at":"2026-07-05T00:40:13.536570Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:40:13.536570Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.06444","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":"2026-07-05T00:40:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"feNpTD8rjkW6Inc9MDtHPjg0tsGmV693l9xwnNpSLrGQzVQ193RRQkXKcFY626f9haxwIeDCLFgwixpzScKeDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T11:03:48.176387Z"},"content_sha256":"bb6f2e8b14b2f3a740d267ac271ef492b4dfeeff19ff4c093e99db919f125228","schema_version":"1.0","event_id":"sha256:bb6f2e8b14b2f3a740d267ac271ef492b4dfeeff19ff4c093e99db919f125228"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:AJQPJF3JZUFXOT4BYNFZSNNIOZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum Non-demolition Measurement of a Many-Body Hamiltonian","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.stat-mech"],"primary_cat":"quant-ph","authors_text":"Andrey Grankin, Dayou Yang, Denis V. Vasilyev, Lukas M. Sieberer, Peter Zoller","submitted_at":"2019-05-15T21:40:15Z","abstract_excerpt":"In an ideal quantum measurement, the wave function of a quantum system collapses to an eigenstate of the measured observable, and the corresponding eigenvalue determines the measurement outcome. If the observable commutes with the system Hamiltonian, repeated measurements yield the same result and thus minimally disturb the system. Seminal quantum optics experiments have achieved such quantum non-demolition (QND) measurements of systems with few degrees of freedom. In contrast, here we describe how the QND measurement of a complex many-body observable, the Hamiltonian of an interacting many-bo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.06444","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/1905.06444/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":"2026-07-05T00:40:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8lzZY9eIlIVRgSJVNZW/MJDTeP2ca43HDD1m7OG2Q0Go4lcMLlePEPt7HmYSq+BqfuAcwA1AdL7s6aEIB46eBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T11:03:48.176929Z"},"content_sha256":"f59f3eebd956942713c9d15c08e7e2c4a0e4ae1c78bd2f77857d9be2e0435427","schema_version":"1.0","event_id":"sha256:f59f3eebd956942713c9d15c08e7e2c4a0e4ae1c78bd2f77857d9be2e0435427"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AJQPJF3JZUFXOT4BYNFZSNNIOZ/bundle.json","state_url":"https://pith.science/pith/AJQPJF3JZUFXOT4BYNFZSNNIOZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AJQPJF3JZUFXOT4BYNFZSNNIOZ/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":"2026-08-15T11:03:48Z","links":{"resolver":"https://pith.science/pith/AJQPJF3JZUFXOT4BYNFZSNNIOZ","bundle":"https://pith.science/pith/AJQPJF3JZUFXOT4BYNFZSNNIOZ/bundle.json","state":"https://pith.science/pith/AJQPJF3JZUFXOT4BYNFZSNNIOZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AJQPJF3JZUFXOT4BYNFZSNNIOZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:AJQPJF3JZUFXOT4BYNFZSNNIOZ","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":"2dd33b6ec81fa5bce9282c641c1768d9ce789437ad1c984c41ded7f3cd0032b1","cross_cats_sorted":["cond-mat.stat-mech"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-05-15T21:40:15Z","title_canon_sha256":"9c83cee18ac36d07e7f3199755a94085e0515fdc419e3be457a88cdcabc7505a"},"schema_version":"1.0","source":{"id":"1905.06444","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.06444","created_at":"2026-07-05T00:40:13Z"},{"alias_kind":"arxiv_version","alias_value":"1905.06444v2","created_at":"2026-07-05T00:40:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.06444","created_at":"2026-07-05T00:40:13Z"},{"alias_kind":"pith_short_12","alias_value":"AJQPJF3JZUFX","created_at":"2026-07-05T00:40:13Z"},{"alias_kind":"pith_short_16","alias_value":"AJQPJF3JZUFXOT4B","created_at":"2026-07-05T00:40:13Z"},{"alias_kind":"pith_short_8","alias_value":"AJQPJF3J","created_at":"2026-07-05T00:40:13Z"}],"graph_snapshots":[{"event_id":"sha256:f59f3eebd956942713c9d15c08e7e2c4a0e4ae1c78bd2f77857d9be2e0435427","target":"graph","created_at":"2026-07-05T00:40:13Z","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/1905.06444/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In an ideal quantum measurement, the wave function of a quantum system collapses to an eigenstate of the measured observable, and the corresponding eigenvalue determines the measurement outcome. If the observable commutes with the system Hamiltonian, repeated measurements yield the same result and thus minimally disturb the system. Seminal quantum optics experiments have achieved such quantum non-demolition (QND) measurements of systems with few degrees of freedom. In contrast, here we describe how the QND measurement of a complex many-body observable, the Hamiltonian of an interacting many-bo","authors_text":"Andrey Grankin, Dayou Yang, Denis V. Vasilyev, Lukas M. Sieberer, Peter Zoller","cross_cats":["cond-mat.stat-mech"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-05-15T21:40:15Z","title":"Quantum Non-demolition Measurement of a Many-Body Hamiltonian"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.06444","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:bb6f2e8b14b2f3a740d267ac271ef492b4dfeeff19ff4c093e99db919f125228","target":"record","created_at":"2026-07-05T00:40:13Z","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":"2dd33b6ec81fa5bce9282c641c1768d9ce789437ad1c984c41ded7f3cd0032b1","cross_cats_sorted":["cond-mat.stat-mech"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-05-15T21:40:15Z","title_canon_sha256":"9c83cee18ac36d07e7f3199755a94085e0515fdc419e3be457a88cdcabc7505a"},"schema_version":"1.0","source":{"id":"1905.06444","kind":"arxiv","version":2}},"canonical_sha256":"0260f49769cd0b774f81c34b9935a87648fc4fa0a8857d24945b2b8b5d963ea5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0260f49769cd0b774f81c34b9935a87648fc4fa0a8857d24945b2b8b5d963ea5","first_computed_at":"2026-07-05T00:40:13.536570Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:40:13.536570Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"5B5OshJ5hVaeY2PfL28IXredcZFmwE6XDIO1wOAGIpm8XWnPGHSTLvt05SkjtgV3TrMce4p/rQYec7zSvOlRBg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:40:13.537040Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.06444","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bb6f2e8b14b2f3a740d267ac271ef492b4dfeeff19ff4c093e99db919f125228","sha256:f59f3eebd956942713c9d15c08e7e2c4a0e4ae1c78bd2f77857d9be2e0435427"],"state_sha256":"210203587aa134ece63225a131449a68302b127605e4269a68c273cfe90b63e7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TwHgClEgJsEsqul9TeLwZ1JKbN0nmIXEOuiW7WO4m9NhHMyDDasnV1CVWydJ0lPMMzPL0XlZaE7RKJOsMC3OAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T11:03:48.180545Z","bundle_sha256":"50304f5ef9f1e83a3ee621ec6dcf4b886d101a47cffec1ee1cea89d5793db1a8"}}