{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:OHPF6ERZM6MBFKVV3ZJH65DXHX","short_pith_number":"pith:OHPF6ERZ","canonical_record":{"source":{"id":"quant-ph/9705021","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"1997-05-12T14:10:44Z","cross_cats_sorted":[],"title_canon_sha256":"dcb4f74022a9fb6f7bc1691ad67ed3af615472b5de7a858105cbad546df48708","abstract_canon_sha256":"6043d2ad3ef98a8ccdd4dcca8bd3ee7d85ace99766aa625648b4a6a047fef1ba"},"schema_version":"1.0"},"canonical_sha256":"71de5f1239679812aab5de527f74773dd682cc030328f091882fe43e3b4dd36d","source":{"kind":"arxiv","id":"quant-ph/9705021","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/9705021","created_at":"2026-07-04T16:06:29Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/9705021v1","created_at":"2026-07-04T16:06:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/9705021","created_at":"2026-07-04T16:06:29Z"},{"alias_kind":"pith_short_12","alias_value":"OHPF6ERZM6MB","created_at":"2026-07-04T16:06:29Z"},{"alias_kind":"pith_short_16","alias_value":"OHPF6ERZM6MBFKVV","created_at":"2026-07-04T16:06:29Z"},{"alias_kind":"pith_short_8","alias_value":"OHPF6ERZ","created_at":"2026-07-04T16:06:29Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:OHPF6ERZM6MBFKVV3ZJH65DXHX","target":"record","payload":{"canonical_record":{"source":{"id":"quant-ph/9705021","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"1997-05-12T14:10:44Z","cross_cats_sorted":[],"title_canon_sha256":"dcb4f74022a9fb6f7bc1691ad67ed3af615472b5de7a858105cbad546df48708","abstract_canon_sha256":"6043d2ad3ef98a8ccdd4dcca8bd3ee7d85ace99766aa625648b4a6a047fef1ba"},"schema_version":"1.0"},"canonical_sha256":"71de5f1239679812aab5de527f74773dd682cc030328f091882fe43e3b4dd36d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:06:29.378646Z","signature_b64":"My0EPqqbKSydwg+3u8fnSPaxMWnhU9q2MMpRu9LqH9gvmqobos8csp4UWyKWT4Iv0xV3KUXkQlHVCKIzmLiyBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"71de5f1239679812aab5de527f74773dd682cc030328f091882fe43e3b4dd36d","last_reissued_at":"2026-07-04T16:06:29.378222Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:06:29.378222Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"quant-ph/9705021","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":"2026-07-04T16:06:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QqTnBbSO3hjZhWP9jANSHAfYQf5fyR3gjAImludQl8vn+qujXI2QKz1dz43lRrl1MeQZGT+W6lrlb/Ig9cgiDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T13:33:45.116509Z"},"content_sha256":"48e494662c3af93ec22d3701fe3d305bca31c4d2593655450aaca55748394882","schema_version":"1.0","event_id":"sha256:48e494662c3af93ec22d3701fe3d305bca31c4d2593655450aaca55748394882"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:OHPF6ERZM6MBFKVV3ZJH65DXHX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical von Neumann measurement","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"G. M. D'Ariano, Italy), M. F. Sacchi (Dipartimento di Fisica 'Alessandro Volta', Pavia","submitted_at":"1997-05-12T14:10:44Z","abstract_excerpt":"We present an optical scheme that realizes the standard von Neumann measurement model, providing an indirect measurement of a quadrature of the field with controllable Gaussian state-reduction. The scheme is made of simple optical elements, as laser sources, beam splitters, and phase sensitive amplifiers, along with a feedback mechanism that uses a Pockels cell. We show that the von Neumann measurement is achieved without the need of working in a ultra-short pulsed regime."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/9705021","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/9705021/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":"2026-07-04T16:06:29Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CQYG0UsfCf/5Vdhu7H6+Bdng9KPjHWxXP+QGBxc8N3hBEmu873fnW+oJko4WHM3EitIeBw09tfOiZ3NmBxcbAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T13:33:45.116978Z"},"content_sha256":"9d15927aaf50d3729028703a5a6a8f51d9dde7fbfa0f1572392ce169e246355e","schema_version":"1.0","event_id":"sha256:9d15927aaf50d3729028703a5a6a8f51d9dde7fbfa0f1572392ce169e246355e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OHPF6ERZM6MBFKVV3ZJH65DXHX/bundle.json","state_url":"https://pith.science/pith/OHPF6ERZM6MBFKVV3ZJH65DXHX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OHPF6ERZM6MBFKVV3ZJH65DXHX/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":"2026-08-06T13:33:45Z","links":{"resolver":"https://pith.science/pith/OHPF6ERZM6MBFKVV3ZJH65DXHX","bundle":"https://pith.science/pith/OHPF6ERZM6MBFKVV3ZJH65DXHX/bundle.json","state":"https://pith.science/pith/OHPF6ERZM6MBFKVV3ZJH65DXHX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OHPF6ERZM6MBFKVV3ZJH65DXHX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:OHPF6ERZM6MBFKVV3ZJH65DXHX","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":"6043d2ad3ef98a8ccdd4dcca8bd3ee7d85ace99766aa625648b4a6a047fef1ba","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"1997-05-12T14:10:44Z","title_canon_sha256":"dcb4f74022a9fb6f7bc1691ad67ed3af615472b5de7a858105cbad546df48708"},"schema_version":"1.0","source":{"id":"quant-ph/9705021","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/9705021","created_at":"2026-07-04T16:06:29Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/9705021v1","created_at":"2026-07-04T16:06:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/9705021","created_at":"2026-07-04T16:06:29Z"},{"alias_kind":"pith_short_12","alias_value":"OHPF6ERZM6MB","created_at":"2026-07-04T16:06:29Z"},{"alias_kind":"pith_short_16","alias_value":"OHPF6ERZM6MBFKVV","created_at":"2026-07-04T16:06:29Z"},{"alias_kind":"pith_short_8","alias_value":"OHPF6ERZ","created_at":"2026-07-04T16:06:29Z"}],"graph_snapshots":[{"event_id":"sha256:9d15927aaf50d3729028703a5a6a8f51d9dde7fbfa0f1572392ce169e246355e","target":"graph","created_at":"2026-07-04T16:06:29Z","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/9705021/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present an optical scheme that realizes the standard von Neumann measurement model, providing an indirect measurement of a quadrature of the field with controllable Gaussian state-reduction. The scheme is made of simple optical elements, as laser sources, beam splitters, and phase sensitive amplifiers, along with a feedback mechanism that uses a Pockels cell. We show that the von Neumann measurement is achieved without the need of working in a ultra-short pulsed regime.","authors_text":"G. M. D'Ariano, Italy), M. F. Sacchi (Dipartimento di Fisica 'Alessandro Volta', Pavia","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"1997-05-12T14:10:44Z","title":"Optical von Neumann measurement"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/9705021","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":"sha256:48e494662c3af93ec22d3701fe3d305bca31c4d2593655450aaca55748394882","target":"record","created_at":"2026-07-04T16:06:29Z","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":"6043d2ad3ef98a8ccdd4dcca8bd3ee7d85ace99766aa625648b4a6a047fef1ba","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"1997-05-12T14:10:44Z","title_canon_sha256":"dcb4f74022a9fb6f7bc1691ad67ed3af615472b5de7a858105cbad546df48708"},"schema_version":"1.0","source":{"id":"quant-ph/9705021","kind":"arxiv","version":1}},"canonical_sha256":"71de5f1239679812aab5de527f74773dd682cc030328f091882fe43e3b4dd36d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"71de5f1239679812aab5de527f74773dd682cc030328f091882fe43e3b4dd36d","first_computed_at":"2026-07-04T16:06:29.378222Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:06:29.378222Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"My0EPqqbKSydwg+3u8fnSPaxMWnhU9q2MMpRu9LqH9gvmqobos8csp4UWyKWT4Iv0xV3KUXkQlHVCKIzmLiyBw==","signature_status":"signed_v1","signed_at":"2026-07-04T16:06:29.378646Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/9705021","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:48e494662c3af93ec22d3701fe3d305bca31c4d2593655450aaca55748394882","sha256:9d15927aaf50d3729028703a5a6a8f51d9dde7fbfa0f1572392ce169e246355e"],"state_sha256":"c361253a3566f7c268e70812f6a6b5d48150cfbf308307bfd04e1ba46563ae2b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vIyQRnZ10r8XKmmenqQVTzqjS/Y8fZ5AhfvY8YojnNCFHDhAH1ns4B76hRXytKqVaUFCa6r4CvzUcQ35Nun2DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T13:33:45.120119Z","bundle_sha256":"fca58ccb005cd374f8fd3ff44b4d90a74bf6ab7d6cfe6470cbabd07197f42a16"}}