{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:LX7GX3TRBJXFUWESEWUMJI5UYH","short_pith_number":"pith:LX7GX3TR","canonical_record":{"source":{"id":"quant-ph/9805032","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"1998-05-11T14:25:50Z","cross_cats_sorted":[],"title_canon_sha256":"45c2f6b67e24d1ab9469d3ac0150c4d2f0178fc360f3dff56268876f3a2fe5e8","abstract_canon_sha256":"799cf390bd7b0d0fa56d8daf16d3c28065a9a0e6c158ac8817e895c984fffb6c"},"schema_version":"1.0"},"canonical_sha256":"5dfe6bee710a6e5a589225a8c4a3b4c1dd85380507788ef7bc9a1f4a6d43fa07","source":{"kind":"arxiv","id":"quant-ph/9805032","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/9805032","created_at":"2026-07-04T16:10:58Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/9805032v1","created_at":"2026-07-04T16:10:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/9805032","created_at":"2026-07-04T16:10:58Z"},{"alias_kind":"pith_short_12","alias_value":"LX7GX3TRBJXF","created_at":"2026-07-04T16:10:58Z"},{"alias_kind":"pith_short_16","alias_value":"LX7GX3TRBJXFUWES","created_at":"2026-07-04T16:10:58Z"},{"alias_kind":"pith_short_8","alias_value":"LX7GX3TR","created_at":"2026-07-04T16:10:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:LX7GX3TRBJXFUWESEWUMJI5UYH","target":"record","payload":{"canonical_record":{"source":{"id":"quant-ph/9805032","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"1998-05-11T14:25:50Z","cross_cats_sorted":[],"title_canon_sha256":"45c2f6b67e24d1ab9469d3ac0150c4d2f0178fc360f3dff56268876f3a2fe5e8","abstract_canon_sha256":"799cf390bd7b0d0fa56d8daf16d3c28065a9a0e6c158ac8817e895c984fffb6c"},"schema_version":"1.0"},"canonical_sha256":"5dfe6bee710a6e5a589225a8c4a3b4c1dd85380507788ef7bc9a1f4a6d43fa07","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:10:58.266949Z","signature_b64":"qhjmtMC1us1kl2B/EmVZci4D4C3J4MzE+2YjlLEpvN6j1PdUv0gn4obrKZAXO3VaOdlBbXTXKhwJBrz18gX/CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5dfe6bee710a6e5a589225a8c4a3b4c1dd85380507788ef7bc9a1f4a6d43fa07","last_reissued_at":"2026-07-04T16:10:58.266560Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:10:58.266560Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"quant-ph/9805032","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":"2026-07-04T16:10:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9az//4PImxCaoRqU1Vu+wAsAOUX6UARKMd0hOD4nh5AdH+pisFGfgmv7ndnjWR0KFbChnEtkhXjQMn08a+u5Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T00:44:01.492240Z"},"content_sha256":"3dd93d5e3c69fdca9237a130bb6b64961503510e6898623848bad5198d615992","schema_version":"1.0","event_id":"sha256:3dd93d5e3c69fdca9237a130bb6b64961503510e6898623848bad5198d615992"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:LX7GX3TRBJXFUWESEWUMJI5UYH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Measuring quantum optical Hamiltonians","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"G. M. D'Ariano, Italy), L. Maccone (Dipartimento di Fisica ``A. Volta'', Pavia","submitted_at":"1998-05-11T14:25:50Z","abstract_excerpt":"We show how recent state-reconstruction techniques can be used to determine the Hamiltonian of an optical device that evolves the quantum state of radiation. A simple experimental setup is proposed for measuring the Liouvillian of phase-insensitive devices. The feasibility of the method with current technology is demonstrated on the basis of Monte Carlo simulated experiments."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/9805032","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/quant-ph/9805032/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":"2026-07-04T16:10:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5sHVvLDY5zFjdngFg5vgDJPq28ZGQuGe3dFTCr8X2vBfuaTF4nDtgz58EZ7vjbrjI1wGUiIKb5Z09c7QJBhADw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T00:44:01.492960Z"},"content_sha256":"9a880abd00c82e928ccb81dc9361a78a22c6bcad063a41b1579f09c48b054ccf","schema_version":"1.0","event_id":"sha256:9a880abd00c82e928ccb81dc9361a78a22c6bcad063a41b1579f09c48b054ccf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LX7GX3TRBJXFUWESEWUMJI5UYH/bundle.json","state_url":"https://pith.science/pith/LX7GX3TRBJXFUWESEWUMJI5UYH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LX7GX3TRBJXFUWESEWUMJI5UYH/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":"2026-08-15T00:44:01Z","links":{"resolver":"https://pith.science/pith/LX7GX3TRBJXFUWESEWUMJI5UYH","bundle":"https://pith.science/pith/LX7GX3TRBJXFUWESEWUMJI5UYH/bundle.json","state":"https://pith.science/pith/LX7GX3TRBJXFUWESEWUMJI5UYH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LX7GX3TRBJXFUWESEWUMJI5UYH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:LX7GX3TRBJXFUWESEWUMJI5UYH","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":"799cf390bd7b0d0fa56d8daf16d3c28065a9a0e6c158ac8817e895c984fffb6c","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"1998-05-11T14:25:50Z","title_canon_sha256":"45c2f6b67e24d1ab9469d3ac0150c4d2f0178fc360f3dff56268876f3a2fe5e8"},"schema_version":"1.0","source":{"id":"quant-ph/9805032","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/9805032","created_at":"2026-07-04T16:10:58Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/9805032v1","created_at":"2026-07-04T16:10:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/9805032","created_at":"2026-07-04T16:10:58Z"},{"alias_kind":"pith_short_12","alias_value":"LX7GX3TRBJXF","created_at":"2026-07-04T16:10:58Z"},{"alias_kind":"pith_short_16","alias_value":"LX7GX3TRBJXFUWES","created_at":"2026-07-04T16:10:58Z"},{"alias_kind":"pith_short_8","alias_value":"LX7GX3TR","created_at":"2026-07-04T16:10:58Z"}],"graph_snapshots":[{"event_id":"sha256:9a880abd00c82e928ccb81dc9361a78a22c6bcad063a41b1579f09c48b054ccf","target":"graph","created_at":"2026-07-04T16:10:58Z","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/quant-ph/9805032/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We show how recent state-reconstruction techniques can be used to determine the Hamiltonian of an optical device that evolves the quantum state of radiation. A simple experimental setup is proposed for measuring the Liouvillian of phase-insensitive devices. The feasibility of the method with current technology is demonstrated on the basis of Monte Carlo simulated experiments.","authors_text":"G. M. D'Ariano, Italy), L. Maccone (Dipartimento di Fisica ``A. Volta'', Pavia","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"1998-05-11T14:25:50Z","title":"Measuring quantum optical Hamiltonians"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/9805032","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":"sha256:3dd93d5e3c69fdca9237a130bb6b64961503510e6898623848bad5198d615992","target":"record","created_at":"2026-07-04T16:10:58Z","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":"799cf390bd7b0d0fa56d8daf16d3c28065a9a0e6c158ac8817e895c984fffb6c","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"1998-05-11T14:25:50Z","title_canon_sha256":"45c2f6b67e24d1ab9469d3ac0150c4d2f0178fc360f3dff56268876f3a2fe5e8"},"schema_version":"1.0","source":{"id":"quant-ph/9805032","kind":"arxiv","version":1}},"canonical_sha256":"5dfe6bee710a6e5a589225a8c4a3b4c1dd85380507788ef7bc9a1f4a6d43fa07","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5dfe6bee710a6e5a589225a8c4a3b4c1dd85380507788ef7bc9a1f4a6d43fa07","first_computed_at":"2026-07-04T16:10:58.266560Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:10:58.266560Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qhjmtMC1us1kl2B/EmVZci4D4C3J4MzE+2YjlLEpvN6j1PdUv0gn4obrKZAXO3VaOdlBbXTXKhwJBrz18gX/CA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:10:58.266949Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/9805032","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3dd93d5e3c69fdca9237a130bb6b64961503510e6898623848bad5198d615992","sha256:9a880abd00c82e928ccb81dc9361a78a22c6bcad063a41b1579f09c48b054ccf"],"state_sha256":"0b2ab964724dadf3bdd47b02e1fcc2a0b5411027c930ae6120e0cebe60e1ddf2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KOHDVWXOZ26pcNqsAerYGOTpaEoWapKq6wL4GcbwPm6SkzFgOofrjy8DBGXdVZ4qrtraeqtN5/TSc8EWiu+RCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T00:44:01.503775Z","bundle_sha256":"867a718d59da31481f6433337d6f7f9f808f8aafff22df879bb5688eec6aa6c6"}}