{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:EGB5ZRKUHI5XUS3ZLEGO3KLFPM","short_pith_number":"pith:EGB5ZRKU","canonical_record":{"source":{"id":"quant-ph/9704020","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"1997-04-10T02:35:04Z","cross_cats_sorted":[],"title_canon_sha256":"20d97a43b56e5e147017d2614490cc2cf0236aaa700bc08009fdf31a37c75044","abstract_canon_sha256":"219c6cd7973da1d8ee56cc78f5fcadbcffd9a5114bccea12f8035088b44334a8"},"schema_version":"1.0"},"canonical_sha256":"2183dcc5543a3b7a4b79590ceda9657b35772608fb55f9145a8c7f9ed2f1e1cb","source":{"kind":"arxiv","id":"quant-ph/9704020","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/9704020","created_at":"2026-05-18T01:05:01Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/9704020v1","created_at":"2026-05-18T01:05:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/9704020","created_at":"2026-05-18T01:05:01Z"},{"alias_kind":"pith_short_12","alias_value":"EGB5ZRKUHI5X","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"EGB5ZRKUHI5XUS3Z","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"EGB5ZRKU","created_at":"2026-05-18T12:25:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:EGB5ZRKUHI5XUS3ZLEGO3KLFPM","target":"record","payload":{"canonical_record":{"source":{"id":"quant-ph/9704020","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"1997-04-10T02:35:04Z","cross_cats_sorted":[],"title_canon_sha256":"20d97a43b56e5e147017d2614490cc2cf0236aaa700bc08009fdf31a37c75044","abstract_canon_sha256":"219c6cd7973da1d8ee56cc78f5fcadbcffd9a5114bccea12f8035088b44334a8"},"schema_version":"1.0"},"canonical_sha256":"2183dcc5543a3b7a4b79590ceda9657b35772608fb55f9145a8c7f9ed2f1e1cb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:05:01.908613Z","signature_b64":"U0afQTVGqxVToYL/OgkbnnTuQgAIRWFlrb1f3HL4bcKzDasj48Ji3v2iDTQl91Qci3mql5U0VbW7YB6XLWI8DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2183dcc5543a3b7a4b79590ceda9657b35772608fb55f9145a8c7f9ed2f1e1cb","last_reissued_at":"2026-05-18T01:05:01.907426Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:05:01.907426Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"quant-ph/9704020","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:05:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q3RRjODA/Gdu0eQAnKAv8bOZFoPpRy70DXaflWEn4g7cjFtrThzAKL+wewYwhODDaMxbI5+V3Jhy1oR0zAvcDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T17:27:47.467397Z"},"content_sha256":"3e4e85e1189b21429e9734f718cf2edd7fdab189e718d52b309d71587a2b398b","schema_version":"1.0","event_id":"sha256:3e4e85e1189b21429e9734f718cf2edd7fdab189e718d52b309d71587a2b398b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:EGB5ZRKUHI5XUS3ZLEGO3KLFPM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Two non-orthogonal states can be cloned by a unitary-reduction process","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Guang-Can Guo (University of Science, Lu-Ming Duan, Technology of China)","submitted_at":"1997-04-10T02:35:04Z","abstract_excerpt":"We show that, there are physical means for cloning two non-orthogonal pure states which are secretly chosen from a certain set $% \\$={ | \\Psi_0 > , | \\Psi_1 > }$. The states are cloned through a unitary evolution together with a measurement. The cloning efficiency can not attain 100%. With some negative measurement results, the cloning fails."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/9704020","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":""},"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":"2026-05-18T01:05:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"MJYPOU7toIkBSIeksUitmz7SQGqa4FWQnabtmyb2doPLjhyFpyLUCXpHOjnfuZAVtgB/MWbQFXsQ/+89DhRKDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T17:27:47.468069Z"},"content_sha256":"d9b64aa44f2fc8d0f26c45c9fa67f12bcc1864d9e48c957b9a80437220f8677a","schema_version":"1.0","event_id":"sha256:d9b64aa44f2fc8d0f26c45c9fa67f12bcc1864d9e48c957b9a80437220f8677a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EGB5ZRKUHI5XUS3ZLEGO3KLFPM/bundle.json","state_url":"https://pith.science/pith/EGB5ZRKUHI5XUS3ZLEGO3KLFPM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EGB5ZRKUHI5XUS3ZLEGO3KLFPM/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":"2026-05-26T17:27:47Z","links":{"resolver":"https://pith.science/pith/EGB5ZRKUHI5XUS3ZLEGO3KLFPM","bundle":"https://pith.science/pith/EGB5ZRKUHI5XUS3ZLEGO3KLFPM/bundle.json","state":"https://pith.science/pith/EGB5ZRKUHI5XUS3ZLEGO3KLFPM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EGB5ZRKUHI5XUS3ZLEGO3KLFPM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:EGB5ZRKUHI5XUS3ZLEGO3KLFPM","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":"219c6cd7973da1d8ee56cc78f5fcadbcffd9a5114bccea12f8035088b44334a8","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"1997-04-10T02:35:04Z","title_canon_sha256":"20d97a43b56e5e147017d2614490cc2cf0236aaa700bc08009fdf31a37c75044"},"schema_version":"1.0","source":{"id":"quant-ph/9704020","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/9704020","created_at":"2026-05-18T01:05:01Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/9704020v1","created_at":"2026-05-18T01:05:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/9704020","created_at":"2026-05-18T01:05:01Z"},{"alias_kind":"pith_short_12","alias_value":"EGB5ZRKUHI5X","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"EGB5ZRKUHI5XUS3Z","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"EGB5ZRKU","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:d9b64aa44f2fc8d0f26c45c9fa67f12bcc1864d9e48c957b9a80437220f8677a","target":"graph","created_at":"2026-05-18T01:05:01Z","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 show that, there are physical means for cloning two non-orthogonal pure states which are secretly chosen from a certain set $% \\$={ | \\Psi_0 > , | \\Psi_1 > }$. The states are cloned through a unitary evolution together with a measurement. The cloning efficiency can not attain 100%. With some negative measurement results, the cloning fails.","authors_text":"Guang-Can Guo (University of Science, Lu-Ming Duan, Technology of China)","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"1997-04-10T02:35:04Z","title":"Two non-orthogonal states can be cloned by a unitary-reduction process"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/9704020","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":"sha256:3e4e85e1189b21429e9734f718cf2edd7fdab189e718d52b309d71587a2b398b","target":"record","created_at":"2026-05-18T01:05:01Z","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":"219c6cd7973da1d8ee56cc78f5fcadbcffd9a5114bccea12f8035088b44334a8","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"1997-04-10T02:35:04Z","title_canon_sha256":"20d97a43b56e5e147017d2614490cc2cf0236aaa700bc08009fdf31a37c75044"},"schema_version":"1.0","source":{"id":"quant-ph/9704020","kind":"arxiv","version":1}},"canonical_sha256":"2183dcc5543a3b7a4b79590ceda9657b35772608fb55f9145a8c7f9ed2f1e1cb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2183dcc5543a3b7a4b79590ceda9657b35772608fb55f9145a8c7f9ed2f1e1cb","first_computed_at":"2026-05-18T01:05:01.907426Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:05:01.907426Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"U0afQTVGqxVToYL/OgkbnnTuQgAIRWFlrb1f3HL4bcKzDasj48Ji3v2iDTQl91Qci3mql5U0VbW7YB6XLWI8DA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:05:01.908613Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/9704020","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3e4e85e1189b21429e9734f718cf2edd7fdab189e718d52b309d71587a2b398b","sha256:d9b64aa44f2fc8d0f26c45c9fa67f12bcc1864d9e48c957b9a80437220f8677a"],"state_sha256":"24287adad1f2c6b07036f4b820e50c64720ae2772a74300fe2f89b05c60c76ce"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"d+Ns1/CpRpt1QUA2If+jrXc4sZfJI1A1M147LmP6oyjmTivMfbQJnPjlrdyt880jj7EAHL4RI31MeNsCRZt8CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T17:27:47.471713Z","bundle_sha256":"59047ef386bdf7b2834e8f45983a730f90fc88caac0a75324f5e2d3e156c7151"}}