{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:JXWVKPHY7FKNFETODMWLGQB7XB","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":"cdb441cb087246adc874ce44d289820618a5e291f8269fb61215671fb4575cae","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-05-24T15:22:22Z","title_canon_sha256":"2401168f0cad84e147ed738f778850b7a7355022a8e60e5b27f80248d23dbcf7"},"schema_version":"1.0","source":{"id":"1905.10282","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.10282","created_at":"2026-05-17T23:43:00Z"},{"alias_kind":"arxiv_version","alias_value":"1905.10282v1","created_at":"2026-05-17T23:43:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.10282","created_at":"2026-05-17T23:43:00Z"},{"alias_kind":"pith_short_12","alias_value":"JXWVKPHY7FKN","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_16","alias_value":"JXWVKPHY7FKNFETO","created_at":"2026-05-18T12:33:21Z"},{"alias_kind":"pith_short_8","alias_value":"JXWVKPHY","created_at":"2026-05-18T12:33:21Z"}],"graph_snapshots":[{"event_id":"sha256:9662109a0205709f8fcb2fc1fbce6691e9fbf45dbe89bff91cc391da8e38858a","target":"graph","created_at":"2026-05-17T23:43:00Z","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":"We describe and experimentally demonstrate a three-party quantum secret sharing protocol using polarization-entangled photon pairs. The source itself serves as an active participant and can switch between the required photon states by modulating the pump beam only, thereby making the protocol less susceptible to loss and amenable to fast switching. Compared to three-photon protocols, the practical efficiency is dramatically improved as there is no need to generate, transmit, or detect a third photon.","authors_text":"Bing Qi, Brian P. Williams, Joseph M. Lukens, Nicholas A. Peters, Warren P. Grice","cross_cats":["physics.optics"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-05-24T15:22:22Z","title":"Quantum secret sharing with polarization-entangled photon pairs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.10282","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:bf3011b2c171cef350a0645c847f727f07c4c6ec573c2a59e3b1168aea41a2e1","target":"record","created_at":"2026-05-17T23:43:00Z","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":"cdb441cb087246adc874ce44d289820618a5e291f8269fb61215671fb4575cae","cross_cats_sorted":["physics.optics"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-05-24T15:22:22Z","title_canon_sha256":"2401168f0cad84e147ed738f778850b7a7355022a8e60e5b27f80248d23dbcf7"},"schema_version":"1.0","source":{"id":"1905.10282","kind":"arxiv","version":1}},"canonical_sha256":"4ded553cf8f954d2926e1b2cb3403fb849430eaf20dd59b73cf08cb68d9fc7a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4ded553cf8f954d2926e1b2cb3403fb849430eaf20dd59b73cf08cb68d9fc7a6","first_computed_at":"2026-05-17T23:43:00.123973Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:00.123973Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DnWjT4tMgvtZeurAm4bJWiEgGSFqJ3wTW0IpZftRFIE+gHdC8WXNHxLcRtt1tcoNJ4XDr1cI8a2TjPiShcwvDQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:00.124442Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.10282","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bf3011b2c171cef350a0645c847f727f07c4c6ec573c2a59e3b1168aea41a2e1","sha256:9662109a0205709f8fcb2fc1fbce6691e9fbf45dbe89bff91cc391da8e38858a"],"state_sha256":"ec77375cc31f9a9d8e5c94a4468ff15ec5b59bfb58b5a70bc948e1bd150e9e16"}