{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:NJB5PQAXM6WAF56Z35TIJDYNQK","short_pith_number":"pith:NJB5PQAX","canonical_record":{"source":{"id":"1202.2163","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-02-10T00:42:08Z","cross_cats_sorted":[],"title_canon_sha256":"178fd64d78f9400745af0df88ef71326f11671613f0b457572f0eb0ea242a0e4","abstract_canon_sha256":"46c1109f975ab54bd1662410e7923e70083302fac660d1784997889a4a4e5842"},"schema_version":"1.0"},"canonical_sha256":"6a43d7c01767ac02f7d9df66848f0d829fabb8c807b617235cd6061dd52e55ce","source":{"kind":"arxiv","id":"1202.2163","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.2163","created_at":"2026-05-18T02:55:50Z"},{"alias_kind":"arxiv_version","alias_value":"1202.2163v1","created_at":"2026-05-18T02:55:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.2163","created_at":"2026-05-18T02:55:50Z"},{"alias_kind":"pith_short_12","alias_value":"NJB5PQAXM6WA","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"NJB5PQAXM6WAF56Z","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"NJB5PQAX","created_at":"2026-05-18T12:27:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:NJB5PQAXM6WAF56Z35TIJDYNQK","target":"record","payload":{"canonical_record":{"source":{"id":"1202.2163","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-02-10T00:42:08Z","cross_cats_sorted":[],"title_canon_sha256":"178fd64d78f9400745af0df88ef71326f11671613f0b457572f0eb0ea242a0e4","abstract_canon_sha256":"46c1109f975ab54bd1662410e7923e70083302fac660d1784997889a4a4e5842"},"schema_version":"1.0"},"canonical_sha256":"6a43d7c01767ac02f7d9df66848f0d829fabb8c807b617235cd6061dd52e55ce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:55:50.099101Z","signature_b64":"niRXsF1G9BrzILlpTR4MAuxfOB1JTk+Kq4ibCGaP0RBqpSQ+Gm2t1bR6l3eS9My2cYbqmODDpkOjzOuPiml2AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6a43d7c01767ac02f7d9df66848f0d829fabb8c807b617235cd6061dd52e55ce","last_reissued_at":"2026-05-18T02:55:50.098438Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:55:50.098438Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1202.2163","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":"2026-05-18T02:55:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bf8OwYks9eMfQ15FRQj7UdsKmzEdie3HgaDPY1Vh3kAlgtEoMA9h6ZelkgZ1BGJQ6w8j7+8fEBRGWUJjroJODg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:47:54.524188Z"},"content_sha256":"2e60acd7c93ddb4cdb8a5c0e7c9daf8aef141499ee3e68d485580ab7bfc0d9c0","schema_version":"1.0","event_id":"sha256:2e60acd7c93ddb4cdb8a5c0e7c9daf8aef141499ee3e68d485580ab7bfc0d9c0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:NJB5PQAXM6WAF56Z35TIJDYNQK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimal multipartite entanglement concentration of electron-spin states based on charge detection and projection measurements","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Bao-Cang Ren, Fu-Fu Du, Fu-Guo Deng, Ming Hua, Tie-Jun Wang","submitted_at":"2012-02-10T00:42:08Z","abstract_excerpt":"We propose an optimal entanglement concentration protocol (ECP) for nonlocal N-electron systems in a partially entangled pure state, resorting to charge detection and the projection measurement on an additional electron. For each nonlocal N-electron system, one party in quantum communication, say Alice first entangles it with an additional electron, and then she projects the additional electron into an orthogonal basis for dividing the N-electron systems into two groups. In the first group, the N parties obtain a subset of $N$-electron systems in a maximally entangled state directly. In the se"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.2163","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":"2026-05-18T02:55:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xvvN0YK0sa3ExtV5EaLqOspggF6GDnwMz4+AuxLiNl8qxrFPn4HWprIi3UvzpMfKowHIxJgai/s2sSWJJLwJCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T15:47:54.524906Z"},"content_sha256":"e376dcfabd9f889de2bc2556c6317ac50262ff4fd9e736ce5695904b0631ad28","schema_version":"1.0","event_id":"sha256:e376dcfabd9f889de2bc2556c6317ac50262ff4fd9e736ce5695904b0631ad28"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NJB5PQAXM6WAF56Z35TIJDYNQK/bundle.json","state_url":"https://pith.science/pith/NJB5PQAXM6WAF56Z35TIJDYNQK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NJB5PQAXM6WAF56Z35TIJDYNQK/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":"2026-05-25T15:47:54Z","links":{"resolver":"https://pith.science/pith/NJB5PQAXM6WAF56Z35TIJDYNQK","bundle":"https://pith.science/pith/NJB5PQAXM6WAF56Z35TIJDYNQK/bundle.json","state":"https://pith.science/pith/NJB5PQAXM6WAF56Z35TIJDYNQK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NJB5PQAXM6WAF56Z35TIJDYNQK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:NJB5PQAXM6WAF56Z35TIJDYNQK","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":"46c1109f975ab54bd1662410e7923e70083302fac660d1784997889a4a4e5842","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-02-10T00:42:08Z","title_canon_sha256":"178fd64d78f9400745af0df88ef71326f11671613f0b457572f0eb0ea242a0e4"},"schema_version":"1.0","source":{"id":"1202.2163","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.2163","created_at":"2026-05-18T02:55:50Z"},{"alias_kind":"arxiv_version","alias_value":"1202.2163v1","created_at":"2026-05-18T02:55:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.2163","created_at":"2026-05-18T02:55:50Z"},{"alias_kind":"pith_short_12","alias_value":"NJB5PQAXM6WA","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_16","alias_value":"NJB5PQAXM6WAF56Z","created_at":"2026-05-18T12:27:16Z"},{"alias_kind":"pith_short_8","alias_value":"NJB5PQAX","created_at":"2026-05-18T12:27:16Z"}],"graph_snapshots":[{"event_id":"sha256:e376dcfabd9f889de2bc2556c6317ac50262ff4fd9e736ce5695904b0631ad28","target":"graph","created_at":"2026-05-18T02:55:50Z","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 propose an optimal entanglement concentration protocol (ECP) for nonlocal N-electron systems in a partially entangled pure state, resorting to charge detection and the projection measurement on an additional electron. For each nonlocal N-electron system, one party in quantum communication, say Alice first entangles it with an additional electron, and then she projects the additional electron into an orthogonal basis for dividing the N-electron systems into two groups. In the first group, the N parties obtain a subset of $N$-electron systems in a maximally entangled state directly. In the se","authors_text":"Bao-Cang Ren, Fu-Fu Du, Fu-Guo Deng, Ming Hua, Tie-Jun Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-02-10T00:42:08Z","title":"Optimal multipartite entanglement concentration of electron-spin states based on charge detection and projection measurements"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.2163","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":"sha256:2e60acd7c93ddb4cdb8a5c0e7c9daf8aef141499ee3e68d485580ab7bfc0d9c0","target":"record","created_at":"2026-05-18T02:55:50Z","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":"46c1109f975ab54bd1662410e7923e70083302fac660d1784997889a4a4e5842","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-02-10T00:42:08Z","title_canon_sha256":"178fd64d78f9400745af0df88ef71326f11671613f0b457572f0eb0ea242a0e4"},"schema_version":"1.0","source":{"id":"1202.2163","kind":"arxiv","version":1}},"canonical_sha256":"6a43d7c01767ac02f7d9df66848f0d829fabb8c807b617235cd6061dd52e55ce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6a43d7c01767ac02f7d9df66848f0d829fabb8c807b617235cd6061dd52e55ce","first_computed_at":"2026-05-18T02:55:50.098438Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:55:50.098438Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"niRXsF1G9BrzILlpTR4MAuxfOB1JTk+Kq4ibCGaP0RBqpSQ+Gm2t1bR6l3eS9My2cYbqmODDpkOjzOuPiml2AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:55:50.099101Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.2163","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2e60acd7c93ddb4cdb8a5c0e7c9daf8aef141499ee3e68d485580ab7bfc0d9c0","sha256:e376dcfabd9f889de2bc2556c6317ac50262ff4fd9e736ce5695904b0631ad28"],"state_sha256":"de516a8bbe515cde1accf3542e80e5cea57489875a2d7d6f2cae56216f7ec45b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w/07Qhsxp19YUYj9s0/UE1KnIAZPP4Erb3r7jiIxEMkw+GnENc1C+RXYFOlxzWIXyPbaDxYnuZWtJE6A4lSfDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T15:47:54.528657Z","bundle_sha256":"6f8ce86e973ee42612aea64c42d3b090734026e1a1a553ab9bf7f85a1869a612"}}