{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:VQH4BHSD55PJYNZZDCIUXDOWMG","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":"b9a924d03ed13469029005602176f7e0b4a6cbba5428f22f99f0f16eea6e073e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-12-30T03:21:02Z","title_canon_sha256":"bebf5d6c68996c54a494cf61ee28695bdb76525e75e14c00ae928744b44d3d7c"},"schema_version":"1.0","source":{"id":"1812.11462","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1812.11462","created_at":"2026-05-17T23:46:53Z"},{"alias_kind":"arxiv_version","alias_value":"1812.11462v3","created_at":"2026-05-17T23:46:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1812.11462","created_at":"2026-05-17T23:46:53Z"},{"alias_kind":"pith_short_12","alias_value":"VQH4BHSD55PJ","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"VQH4BHSD55PJYNZZ","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"VQH4BHSD","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:a7d9da231cb08b029d97c605ecf4c04d330b76942c0fc27243a6182d1eedcd61","target":"graph","created_at":"2026-05-17T23:46:53Z","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":"Density matrices of pure multiphoton Fock polarization states and of arising from them reduced density matrices of mixed states are expressed in similar ways in terms of matrices of correlators defined as averaged products of equal numbers of creation and annihilation operators. Degree of entanglement of considered states is evaluated for various combinations of parameters of states and character of their reduction.","authors_text":"D. A. Grigoriev, M. V. Fedorov, N.I. Miklin, S. V. Vintskevich","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-12-30T03:21:02Z","title":"Entanglement of multiphoton polarization Fock states and their superpositions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.11462","kind":"arxiv","version":3},"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":"sha256:62a63bc3e8b6985036c912927176769c812ab8fb5b36411e0009bc8d3032580f","target":"record","created_at":"2026-05-17T23:46:53Z","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":"b9a924d03ed13469029005602176f7e0b4a6cbba5428f22f99f0f16eea6e073e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-12-30T03:21:02Z","title_canon_sha256":"bebf5d6c68996c54a494cf61ee28695bdb76525e75e14c00ae928744b44d3d7c"},"schema_version":"1.0","source":{"id":"1812.11462","kind":"arxiv","version":3}},"canonical_sha256":"ac0fc09e43ef5e9c373918914b8dd661aff2df2d555bd5a4e9b0a957e9c555f1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ac0fc09e43ef5e9c373918914b8dd661aff2df2d555bd5a4e9b0a957e9c555f1","first_computed_at":"2026-05-17T23:46:53.064015Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:46:53.064015Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zJXHjNi7K13r2sHaL40pEm3+aUSGXmyHncNFjX7w38zT4JbO2TJxXlZaw+bcRrKc8Xe2DBMydBmwA+sP4BY9BA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:46:53.064607Z","signed_message":"canonical_sha256_bytes"},"source_id":"1812.11462","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:62a63bc3e8b6985036c912927176769c812ab8fb5b36411e0009bc8d3032580f","sha256:a7d9da231cb08b029d97c605ecf4c04d330b76942c0fc27243a6182d1eedcd61"],"state_sha256":"d6dea83eeb80740929aed69b7dfca34c629204954bb272ca83fe5e1f56478f0e"}