{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:4YQFYYWOYAQEVQR5OF6OWZNRC2","short_pith_number":"pith:4YQFYYWO","canonical_record":{"source":{"id":"1104.3643","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-04-19T05:37:59Z","cross_cats_sorted":[],"title_canon_sha256":"94d1c1f3026b2ab053dcaacb08fccdbcf831afa729796df6e34f24c260e5447b","abstract_canon_sha256":"d36ae25697a3fe978ab16a943a25cbfcbd8196c6ca31d3c9a306b4a63453c417"},"schema_version":"1.0"},"canonical_sha256":"e6205c62cec0204ac23d717ceb65b116823249d4b7d2fb6d86ec608f195bb952","source":{"kind":"arxiv","id":"1104.3643","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.3643","created_at":"2026-05-18T02:02:23Z"},{"alias_kind":"arxiv_version","alias_value":"1104.3643v1","created_at":"2026-05-18T02:02:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.3643","created_at":"2026-05-18T02:02:23Z"},{"alias_kind":"pith_short_12","alias_value":"4YQFYYWOYAQE","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"4YQFYYWOYAQEVQR5","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"4YQFYYWO","created_at":"2026-05-18T12:26:20Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:4YQFYYWOYAQEVQR5OF6OWZNRC2","target":"record","payload":{"canonical_record":{"source":{"id":"1104.3643","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-04-19T05:37:59Z","cross_cats_sorted":[],"title_canon_sha256":"94d1c1f3026b2ab053dcaacb08fccdbcf831afa729796df6e34f24c260e5447b","abstract_canon_sha256":"d36ae25697a3fe978ab16a943a25cbfcbd8196c6ca31d3c9a306b4a63453c417"},"schema_version":"1.0"},"canonical_sha256":"e6205c62cec0204ac23d717ceb65b116823249d4b7d2fb6d86ec608f195bb952","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:02:23.085263Z","signature_b64":"+xUY286OGXDffAgfYcyrIYxxZ9jQHVkzRDlqqFfsFF7qACmvlEQB9LrCpG+l9ZN/SURfoV56NiJPJDbENF8SAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e6205c62cec0204ac23d717ceb65b116823249d4b7d2fb6d86ec608f195bb952","last_reissued_at":"2026-05-18T02:02:23.084449Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:02:23.084449Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1104.3643","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":"2026-05-18T02:02:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RWQRzfx3M++ey5ebhmew8d1olsBuzjkHrfqR5W/FHlgsYdVpbf66Hh02ddf193GjO7graB/IEysP9VBf53rvDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T20:48:08.964649Z"},"content_sha256":"96a4cab73949f4434b49adad874009416a96458ea1ab4ccd1be59a851a8593f1","schema_version":"1.0","event_id":"sha256:96a4cab73949f4434b49adad874009416a96458ea1ab4ccd1be59a851a8593f1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:4YQFYYWOYAQEVQR5OF6OWZNRC2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"NMR Experimental Demonstration of Probabilistic Quantum Cloning","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Bo Chong, Dawei Lu, Gan Qin, Hongwei Chen, Jiangfeng Du, Xianyi Zhou, Xinhua Peng","submitted_at":"2011-04-19T05:37:59Z","abstract_excerpt":"The method of quantum cloning is divided into two main categories: approximate and probabilistic quantum cloning. The former method is used to approximate an unknown quantum state deterministically, and the latter can be used to faithfully copy the state probabilistically. So far, many approximate cloning machines have been experimentally demonstrated, but probabilistic cloning remains an experimental challenge, as it requires more complicated networks and a higher level of precision control. In this work, we designed an efficient quantum network with a limited amount of resources, and perform"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.3643","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":"2026-05-18T02:02:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pHjfQlT83QtknEBONTcY9tqCAXPvujwkYlI1Igy4DW5izEX7t0WGlciaaS18FVXnxMpqYGBB/8gRTWA28ClKAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T20:48:08.965260Z"},"content_sha256":"34c4abb9e6e757859d1260f3f13ad57b15a4e62e418532e1e3b76b0ac888b8e4","schema_version":"1.0","event_id":"sha256:34c4abb9e6e757859d1260f3f13ad57b15a4e62e418532e1e3b76b0ac888b8e4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4YQFYYWOYAQEVQR5OF6OWZNRC2/bundle.json","state_url":"https://pith.science/pith/4YQFYYWOYAQEVQR5OF6OWZNRC2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4YQFYYWOYAQEVQR5OF6OWZNRC2/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":"2026-05-27T20:48:08Z","links":{"resolver":"https://pith.science/pith/4YQFYYWOYAQEVQR5OF6OWZNRC2","bundle":"https://pith.science/pith/4YQFYYWOYAQEVQR5OF6OWZNRC2/bundle.json","state":"https://pith.science/pith/4YQFYYWOYAQEVQR5OF6OWZNRC2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4YQFYYWOYAQEVQR5OF6OWZNRC2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:4YQFYYWOYAQEVQR5OF6OWZNRC2","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":"d36ae25697a3fe978ab16a943a25cbfcbd8196c6ca31d3c9a306b4a63453c417","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-04-19T05:37:59Z","title_canon_sha256":"94d1c1f3026b2ab053dcaacb08fccdbcf831afa729796df6e34f24c260e5447b"},"schema_version":"1.0","source":{"id":"1104.3643","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.3643","created_at":"2026-05-18T02:02:23Z"},{"alias_kind":"arxiv_version","alias_value":"1104.3643v1","created_at":"2026-05-18T02:02:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.3643","created_at":"2026-05-18T02:02:23Z"},{"alias_kind":"pith_short_12","alias_value":"4YQFYYWOYAQE","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_16","alias_value":"4YQFYYWOYAQEVQR5","created_at":"2026-05-18T12:26:20Z"},{"alias_kind":"pith_short_8","alias_value":"4YQFYYWO","created_at":"2026-05-18T12:26:20Z"}],"graph_snapshots":[{"event_id":"sha256:34c4abb9e6e757859d1260f3f13ad57b15a4e62e418532e1e3b76b0ac888b8e4","target":"graph","created_at":"2026-05-18T02:02:23Z","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":"The method of quantum cloning is divided into two main categories: approximate and probabilistic quantum cloning. The former method is used to approximate an unknown quantum state deterministically, and the latter can be used to faithfully copy the state probabilistically. So far, many approximate cloning machines have been experimentally demonstrated, but probabilistic cloning remains an experimental challenge, as it requires more complicated networks and a higher level of precision control. In this work, we designed an efficient quantum network with a limited amount of resources, and perform","authors_text":"Bo Chong, Dawei Lu, Gan Qin, Hongwei Chen, Jiangfeng Du, Xianyi Zhou, Xinhua Peng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-04-19T05:37:59Z","title":"NMR Experimental Demonstration of Probabilistic Quantum Cloning"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.3643","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":"sha256:96a4cab73949f4434b49adad874009416a96458ea1ab4ccd1be59a851a8593f1","target":"record","created_at":"2026-05-18T02:02:23Z","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":"d36ae25697a3fe978ab16a943a25cbfcbd8196c6ca31d3c9a306b4a63453c417","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-04-19T05:37:59Z","title_canon_sha256":"94d1c1f3026b2ab053dcaacb08fccdbcf831afa729796df6e34f24c260e5447b"},"schema_version":"1.0","source":{"id":"1104.3643","kind":"arxiv","version":1}},"canonical_sha256":"e6205c62cec0204ac23d717ceb65b116823249d4b7d2fb6d86ec608f195bb952","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e6205c62cec0204ac23d717ceb65b116823249d4b7d2fb6d86ec608f195bb952","first_computed_at":"2026-05-18T02:02:23.084449Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:02:23.084449Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+xUY286OGXDffAgfYcyrIYxxZ9jQHVkzRDlqqFfsFF7qACmvlEQB9LrCpG+l9ZN/SURfoV56NiJPJDbENF8SAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:02:23.085263Z","signed_message":"canonical_sha256_bytes"},"source_id":"1104.3643","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:96a4cab73949f4434b49adad874009416a96458ea1ab4ccd1be59a851a8593f1","sha256:34c4abb9e6e757859d1260f3f13ad57b15a4e62e418532e1e3b76b0ac888b8e4"],"state_sha256":"069eeab4b93dd76236932416c4ae0456a60fe23c69550a1f9ace3489d92f2a94"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8MkufZED4qaz1rjM8ovGR3mqnrjKEloXbxWt5qvGFDiN+qsnvHYexFcCxPMCOQWLMpeb4bUu7XNe9jvNsmbTCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T20:48:08.967615Z","bundle_sha256":"a407247dd98e939eee38ebd72656aa7e855273a20635e642a334a6f5eedcf5b4"}}