{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:N7AFDDNZJTWJQZJZMHJPDQK46Y","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":"929c0915e6dd8b0647d522b52411777143eeee275072d8fed41be89664cfb5bc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-05-18T18:50:31Z","title_canon_sha256":"c9a76c50f7de1f1c3e78b6fd73e3568063869281a0ab0e37926af482995ecf47"},"schema_version":"1.0","source":{"id":"1305.4290","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.4290","created_at":"2026-05-18T01:49:49Z"},{"alias_kind":"arxiv_version","alias_value":"1305.4290v2","created_at":"2026-05-18T01:49:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.4290","created_at":"2026-05-18T01:49:49Z"},{"alias_kind":"pith_short_12","alias_value":"N7AFDDNZJTWJ","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_16","alias_value":"N7AFDDNZJTWJQZJZ","created_at":"2026-05-18T12:27:52Z"},{"alias_kind":"pith_short_8","alias_value":"N7AFDDNZ","created_at":"2026-05-18T12:27:52Z"}],"graph_snapshots":[{"event_id":"sha256:338f2fd93f63dcc09fa8e09e1d97eee350a073803421f8670e427f58d93407f1","target":"graph","created_at":"2026-05-18T01:49:49Z","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 discuss sequential unambiguous state-discrimination measurements performed on the same qubit. Alice prepares a qubit in one of two possible states. The qubit is first sent to Bob, who measures it, and then on to Charlie, who also measures it. The object in both cases is to determine which state Alice sent. In an unambiguous state discrimination measurement, we never make a mistake, i.e. misidentify the state, but the measurement may fail, in which case we gain no information about which state was sent. We find that there is a nonzero probability for both Bob and Charlie to identify the stat","authors_text":"Edgar Feldman, Janos Bergou, Mark Hillery","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-05-18T18:50:31Z","title":"Extracting information from a qubit by multiple observers: Toward a theory of sequential state discrimination"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.4290","kind":"arxiv","version":2},"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:cc87a89d26c57ba3d8ebd97b63c9fc25a0e4a7b2a7c0164afb80942302f40989","target":"record","created_at":"2026-05-18T01:49:49Z","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":"929c0915e6dd8b0647d522b52411777143eeee275072d8fed41be89664cfb5bc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-05-18T18:50:31Z","title_canon_sha256":"c9a76c50f7de1f1c3e78b6fd73e3568063869281a0ab0e37926af482995ecf47"},"schema_version":"1.0","source":{"id":"1305.4290","kind":"arxiv","version":2}},"canonical_sha256":"6fc0518db94cec98653961d2f1c15cf63d8682920fab1da1620b97e5550bc109","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6fc0518db94cec98653961d2f1c15cf63d8682920fab1da1620b97e5550bc109","first_computed_at":"2026-05-18T01:49:49.040142Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:49:49.040142Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"26nF7zI0teddmrYPu1t4Kf6/TXfjJsyHMMSwhVi97BSWq0yBOqSIkW2987mg5i39HwUxmuXO9x98igag7Ew0Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:49:49.040627Z","signed_message":"canonical_sha256_bytes"},"source_id":"1305.4290","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cc87a89d26c57ba3d8ebd97b63c9fc25a0e4a7b2a7c0164afb80942302f40989","sha256:338f2fd93f63dcc09fa8e09e1d97eee350a073803421f8670e427f58d93407f1"],"state_sha256":"d28a997df9133c03fea0c44774fc65c4d69964bfe96412cdc68e42465980cf89"}