{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:VQH4BHSD55PJYNZZDCIUXDOWMG","short_pith_number":"pith:VQH4BHSD","canonical_record":{"source":{"id":"1812.11462","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-12-30T03:21:02Z","cross_cats_sorted":[],"title_canon_sha256":"bebf5d6c68996c54a494cf61ee28695bdb76525e75e14c00ae928744b44d3d7c","abstract_canon_sha256":"b9a924d03ed13469029005602176f7e0b4a6cbba5428f22f99f0f16eea6e073e"},"schema_version":"1.0"},"canonical_sha256":"ac0fc09e43ef5e9c373918914b8dd661aff2df2d555bd5a4e9b0a957e9c555f1","source":{"kind":"arxiv","id":"1812.11462","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"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:VQH4BHSD55PJYNZZDCIUXDOWMG","target":"record","payload":{"canonical_record":{"source":{"id":"1812.11462","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-12-30T03:21:02Z","cross_cats_sorted":[],"title_canon_sha256":"bebf5d6c68996c54a494cf61ee28695bdb76525e75e14c00ae928744b44d3d7c","abstract_canon_sha256":"b9a924d03ed13469029005602176f7e0b4a6cbba5428f22f99f0f16eea6e073e"},"schema_version":"1.0"},"canonical_sha256":"ac0fc09e43ef5e9c373918914b8dd661aff2df2d555bd5a4e9b0a957e9c555f1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:46:53.064607Z","signature_b64":"zJXHjNi7K13r2sHaL40pEm3+aUSGXmyHncNFjX7w38zT4JbO2TJxXlZaw+bcRrKc8Xe2DBMydBmwA+sP4BY9BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ac0fc09e43ef5e9c373918914b8dd661aff2df2d555bd5a4e9b0a957e9c555f1","last_reissued_at":"2026-05-17T23:46:53.064015Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:46:53.064015Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1812.11462","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:46:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p6XGFKpyk8/elAHqungIq0NxSnWm6p3hWesYiEVpZGBu3od8X38vAqZrxQikTBJo11Pi2m4ofQm58AxteJkhCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T18:17:14.779672Z"},"content_sha256":"62a63bc3e8b6985036c912927176769c812ab8fb5b36411e0009bc8d3032580f","schema_version":"1.0","event_id":"sha256:62a63bc3e8b6985036c912927176769c812ab8fb5b36411e0009bc8d3032580f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:VQH4BHSD55PJYNZZDCIUXDOWMG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Entanglement of multiphoton polarization Fock states and their superpositions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"D. A. Grigoriev, M. V. Fedorov, N.I. Miklin, S. V. Vintskevich","submitted_at":"2018-12-30T03:21:02Z","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."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1812.11462","kind":"arxiv","version":3},"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":"2026-05-17T23:46:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tPDeNHszLHqWG0EyHBQzPeJSctGvg90mUq0JNdjRBsEYBfjh10Wl15e5uFCdwvVvezXwlbvmkqxfUBzAdez0Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-04T18:17:14.780008Z"},"content_sha256":"a7d9da231cb08b029d97c605ecf4c04d330b76942c0fc27243a6182d1eedcd61","schema_version":"1.0","event_id":"sha256:a7d9da231cb08b029d97c605ecf4c04d330b76942c0fc27243a6182d1eedcd61"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VQH4BHSD55PJYNZZDCIUXDOWMG/bundle.json","state_url":"https://pith.science/pith/VQH4BHSD55PJYNZZDCIUXDOWMG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VQH4BHSD55PJYNZZDCIUXDOWMG/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":"2026-07-04T18:17:14Z","links":{"resolver":"https://pith.science/pith/VQH4BHSD55PJYNZZDCIUXDOWMG","bundle":"https://pith.science/pith/VQH4BHSD55PJYNZZDCIUXDOWMG/bundle.json","state":"https://pith.science/pith/VQH4BHSD55PJYNZZDCIUXDOWMG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VQH4BHSD55PJYNZZDCIUXDOWMG/bundle.json"},"state":{"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"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JB6TVKX5AKG1Q+YarBBpYeUxH1sPTfxRRJ8M8kfif3ne/KnAI2bqd0XBR4eT7B/cATcbX9+8MB64Hg8BwOv2Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-04T18:17:14.781920Z","bundle_sha256":"3b618fa5080174cff944e24f7ba0de0f8f8ed255cb7079e05cb16436e8c26e0a"}}