{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:AN5DYMZKDJBIUCJ2THRVIUYMAE","short_pith_number":"pith:AN5DYMZK","canonical_record":{"source":{"id":"quant-ph/9905036","kind":"arxiv","version":4},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"1999-05-11T10:10:49Z","cross_cats_sorted":[],"title_canon_sha256":"85e9c6917110c9054deb6250841a64699247dd2fe5fe22bfb1e1fc594ded3f64","abstract_canon_sha256":"4bee93ad1ed014090e3ca750af0e426772b63cf08c39bae1b320d940634bc2f5"},"schema_version":"1.0"},"canonical_sha256":"037a3c332a1a428a093a99e354530c0113bffed48204f801a475022fc5ea302c","source":{"kind":"arxiv","id":"quant-ph/9905036","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/9905036","created_at":"2026-07-04T15:51:38Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/9905036v4","created_at":"2026-07-04T15:51:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/9905036","created_at":"2026-07-04T15:51:38Z"},{"alias_kind":"pith_short_12","alias_value":"AN5DYMZKDJBI","created_at":"2026-07-04T15:51:38Z"},{"alias_kind":"pith_short_16","alias_value":"AN5DYMZKDJBIUCJ2","created_at":"2026-07-04T15:51:38Z"},{"alias_kind":"pith_short_8","alias_value":"AN5DYMZK","created_at":"2026-07-04T15:51:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:AN5DYMZKDJBIUCJ2THRVIUYMAE","target":"record","payload":{"canonical_record":{"source":{"id":"quant-ph/9905036","kind":"arxiv","version":4},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"1999-05-11T10:10:49Z","cross_cats_sorted":[],"title_canon_sha256":"85e9c6917110c9054deb6250841a64699247dd2fe5fe22bfb1e1fc594ded3f64","abstract_canon_sha256":"4bee93ad1ed014090e3ca750af0e426772b63cf08c39bae1b320d940634bc2f5"},"schema_version":"1.0"},"canonical_sha256":"037a3c332a1a428a093a99e354530c0113bffed48204f801a475022fc5ea302c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:51:38.003711Z","signature_b64":"8FMbQzR2rx4tCddA1oy21G2VJvG43ca0FH3Ql2aCuw4W6YqPgPCErGeTeBkxJbzwf1r1zO97/+cgoKKxmApTAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"037a3c332a1a428a093a99e354530c0113bffed48204f801a475022fc5ea302c","last_reissued_at":"2026-07-04T15:51:38.003333Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:51:38.003333Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"quant-ph/9905036","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:51:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ITDYb04BjmUkTLuYukyNvMZbyC3XR2EPNHc4SRYfVbtacD7twCuVBxv+GF5BEazpA7rCIxPos5DLgNKM1JF+CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T06:22:17.545369Z"},"content_sha256":"faed93f57788b7e2ad7a0f457f3ba11fdfcea5fe4440500b1e619a863b6fc901","schema_version":"1.0","event_id":"sha256:faed93f57788b7e2ad7a0f457f3ba11fdfcea5fe4440500b1e619a863b6fc901"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:AN5DYMZKDJBIUCJ2THRVIUYMAE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimal Universal Disentangling Machine for Two Qubit Quantum States","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Anirban Roy, Debasis Sarkar, Guruprasad Kar, Sibasish Ghosh, Somshubhro Bandyopadhyay","submitted_at":"1999-05-11T10:10:49Z","abstract_excerpt":"We derive the optimal curve satisfied by the reduction factors, in the case of universal disentangling machine which uses only local operations. Impossibility of constructing a better disentangling machine, by using non-local operations, is discussed."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/9905036","kind":"arxiv","version":4},"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/9905036/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:51:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iSVmpMy80YijLoO6kQT6YT621EQ6uzB9zCjSLuXUjvF+SCsXtOzVhAarrAnEbLOuoJiaAhMt/4U0GuVGpw3aBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-15T06:22:17.546266Z"},"content_sha256":"da1935ca9d8f76fed6cbcc136545e471c82c448d8b345102f89e926633efd522","schema_version":"1.0","event_id":"sha256:da1935ca9d8f76fed6cbcc136545e471c82c448d8b345102f89e926633efd522"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AN5DYMZKDJBIUCJ2THRVIUYMAE/bundle.json","state_url":"https://pith.science/pith/AN5DYMZKDJBIUCJ2THRVIUYMAE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AN5DYMZKDJBIUCJ2THRVIUYMAE/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":"2026-08-15T06:22:17Z","links":{"resolver":"https://pith.science/pith/AN5DYMZKDJBIUCJ2THRVIUYMAE","bundle":"https://pith.science/pith/AN5DYMZKDJBIUCJ2THRVIUYMAE/bundle.json","state":"https://pith.science/pith/AN5DYMZKDJBIUCJ2THRVIUYMAE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AN5DYMZKDJBIUCJ2THRVIUYMAE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:AN5DYMZKDJBIUCJ2THRVIUYMAE","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":"4bee93ad1ed014090e3ca750af0e426772b63cf08c39bae1b320d940634bc2f5","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"1999-05-11T10:10:49Z","title_canon_sha256":"85e9c6917110c9054deb6250841a64699247dd2fe5fe22bfb1e1fc594ded3f64"},"schema_version":"1.0","source":{"id":"quant-ph/9905036","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/9905036","created_at":"2026-07-04T15:51:38Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/9905036v4","created_at":"2026-07-04T15:51:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/9905036","created_at":"2026-07-04T15:51:38Z"},{"alias_kind":"pith_short_12","alias_value":"AN5DYMZKDJBI","created_at":"2026-07-04T15:51:38Z"},{"alias_kind":"pith_short_16","alias_value":"AN5DYMZKDJBIUCJ2","created_at":"2026-07-04T15:51:38Z"},{"alias_kind":"pith_short_8","alias_value":"AN5DYMZK","created_at":"2026-07-04T15:51:38Z"}],"graph_snapshots":[{"event_id":"sha256:da1935ca9d8f76fed6cbcc136545e471c82c448d8b345102f89e926633efd522","target":"graph","created_at":"2026-07-04T15:51:38Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/quant-ph/9905036/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We derive the optimal curve satisfied by the reduction factors, in the case of universal disentangling machine which uses only local operations. Impossibility of constructing a better disentangling machine, by using non-local operations, is discussed.","authors_text":"Anirban Roy, Debasis Sarkar, Guruprasad Kar, Sibasish Ghosh, Somshubhro Bandyopadhyay","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"1999-05-11T10:10:49Z","title":"Optimal Universal Disentangling Machine for Two Qubit Quantum States"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/9905036","kind":"arxiv","version":4},"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:faed93f57788b7e2ad7a0f457f3ba11fdfcea5fe4440500b1e619a863b6fc901","target":"record","created_at":"2026-07-04T15:51:38Z","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":"4bee93ad1ed014090e3ca750af0e426772b63cf08c39bae1b320d940634bc2f5","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"1999-05-11T10:10:49Z","title_canon_sha256":"85e9c6917110c9054deb6250841a64699247dd2fe5fe22bfb1e1fc594ded3f64"},"schema_version":"1.0","source":{"id":"quant-ph/9905036","kind":"arxiv","version":4}},"canonical_sha256":"037a3c332a1a428a093a99e354530c0113bffed48204f801a475022fc5ea302c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"037a3c332a1a428a093a99e354530c0113bffed48204f801a475022fc5ea302c","first_computed_at":"2026-07-04T15:51:38.003333Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:51:38.003333Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8FMbQzR2rx4tCddA1oy21G2VJvG43ca0FH3Ql2aCuw4W6YqPgPCErGeTeBkxJbzwf1r1zO97/+cgoKKxmApTAQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:51:38.003711Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/9905036","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:faed93f57788b7e2ad7a0f457f3ba11fdfcea5fe4440500b1e619a863b6fc901","sha256:da1935ca9d8f76fed6cbcc136545e471c82c448d8b345102f89e926633efd522"],"state_sha256":"a65e13e4ed67525b6c3fc132e7061f74ba757dc2295a7082e3e4ffdf1dd13da0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4y4iPdJb3c7MNj9otlBps82VucV03LS9vneCS9XRsD42naHCCWyaPMjhn4WjfNwVZ7PCUQzO4+OYA3Lz7zoRBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-15T06:22:17.552641Z","bundle_sha256":"470e8018d7f20da87fab5faf4394cf6bd461c2183ba2908d80802bd044aa3801"}}