{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2000:THDDNOJHANFSNXSKMGABYZYN2B","short_pith_number":"pith:THDDNOJH","schema_version":"1.0","canonical_sha256":"99c636b927034b26de4a61801c670dd04d506c6abb50723169fbf83969e03149","source":{"kind":"arxiv","id":"quant-ph/0003099","version":1},"attestation_state":"computed","paper":{"title":"Improved two-party and multi-party purification protocols","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Elitza N. Maneva, John A. Smolin","submitted_at":"2000-03-21T21:40:27Z","abstract_excerpt":"We present an improved protocol for entanglement purification of bipartite mixed states using several states at a time rather than two at a time as in the traditional recurrence method. We also present a generalization of the hashing method to n-partite cat states, which achieves a finite yield of pure cat states for any desired fidelity. Our results are compared to previous protocols."},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"quant-ph/0003099","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2000-03-21T21:40:27Z","cross_cats_sorted":[],"title_canon_sha256":"76e21239d55836b2087d2d3e6bdb039166fc72cac4486ef269b0451a8565c817","abstract_canon_sha256":"95138e089fd7157c8db31d1021749f6d8a6440a26bbf135289ba5606146e170c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:45:27.240287Z","signature_b64":"ClBMoDXPi5KIC0xDISDfSKa0F8WMVfsHIoXr2t00qCCWlP7INe1KIU/T68+irW2eV8LmHLfd8hZTQ2hk5qJaCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"99c636b927034b26de4a61801c670dd04d506c6abb50723169fbf83969e03149","last_reissued_at":"2026-07-04T14:45:27.239961Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:45:27.239961Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Improved two-party and multi-party purification protocols","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Elitza N. Maneva, John A. Smolin","submitted_at":"2000-03-21T21:40:27Z","abstract_excerpt":"We present an improved protocol for entanglement purification of bipartite mixed states using several states at a time rather than two at a time as in the traditional recurrence method. We also present a generalization of the hashing method to n-partite cat states, which achieves a finite yield of pure cat states for any desired fidelity. Our results are compared to previous protocols."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0003099","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/0003099/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0003099","created_at":"2026-07-04T14:45:27.240011+00:00"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0003099v1","created_at":"2026-07-04T14:45:27.240011+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0003099","created_at":"2026-07-04T14:45:27.240011+00:00"},{"alias_kind":"pith_short_12","alias_value":"THDDNOJHANFS","created_at":"2026-07-04T14:45:27.240011+00:00"},{"alias_kind":"pith_short_16","alias_value":"THDDNOJHANFSNXSK","created_at":"2026-07-04T14:45:27.240011+00:00"},{"alias_kind":"pith_short_8","alias_value":"THDDNOJH","created_at":"2026-07-04T14:45:27.240011+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2605.26757","citing_title":"Practical Entanglement Distillation Protocols with Quadratic Error Suppression","ref_index":17,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/THDDNOJHANFSNXSKMGABYZYN2B","json":"https://pith.science/pith/THDDNOJHANFSNXSKMGABYZYN2B.json","graph_json":"https://pith.science/api/pith-number/THDDNOJHANFSNXSKMGABYZYN2B/graph.json","events_json":"https://pith.science/api/pith-number/THDDNOJHANFSNXSKMGABYZYN2B/events.json","paper":"https://pith.science/paper/THDDNOJH"},"agent_actions":{"view_html":"https://pith.science/pith/THDDNOJHANFSNXSKMGABYZYN2B","download_json":"https://pith.science/pith/THDDNOJHANFSNXSKMGABYZYN2B.json","view_paper":"https://pith.science/paper/THDDNOJH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=quant-ph/0003099&json=true","fetch_graph":"https://pith.science/api/pith-number/THDDNOJHANFSNXSKMGABYZYN2B/graph.json","fetch_events":"https://pith.science/api/pith-number/THDDNOJHANFSNXSKMGABYZYN2B/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/THDDNOJHANFSNXSKMGABYZYN2B/action/timestamp_anchor","attest_storage":"https://pith.science/pith/THDDNOJHANFSNXSKMGABYZYN2B/action/storage_attestation","attest_author":"https://pith.science/pith/THDDNOJHANFSNXSKMGABYZYN2B/action/author_attestation","sign_citation":"https://pith.science/pith/THDDNOJHANFSNXSKMGABYZYN2B/action/citation_signature","submit_replication":"https://pith.science/pith/THDDNOJHANFSNXSKMGABYZYN2B/action/replication_record"}},"created_at":"2026-07-04T14:45:27.240011+00:00","updated_at":"2026-07-04T14:45:27.240011+00:00"}