{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:WIVDAQ56ZHYD2CAONHY34RTBAJ","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":"49d811c134fa5fd39427313dc0fc20500824bf815194664e43b58145f11b69c0","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-03-15T05:59:51Z","title_canon_sha256":"28646dbc60a39c36dc20a0a824bcd0fd451e0fb11fa8aacb91639ac4fef87acf"},"schema_version":"1.0","source":{"id":"1803.05608","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.05608","created_at":"2026-05-18T00:09:15Z"},{"alias_kind":"arxiv_version","alias_value":"1803.05608v1","created_at":"2026-05-18T00:09:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.05608","created_at":"2026-05-18T00:09:15Z"},{"alias_kind":"pith_short_12","alias_value":"WIVDAQ56ZHYD","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"WIVDAQ56ZHYD2CAO","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"WIVDAQ56","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:5ba3ada67ef2592a3f3011cff1c4249227c513600254c0e95752684bd96798d0","target":"graph","created_at":"2026-05-18T00:09:15Z","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 ability to optically initialize the electronic spin of the nitrogen-vacancy (NV) center in diamond has long been considered a valuable resource to enhance the polarization of neighboring nuclei, but efficient polarization transfer to spin species outside the diamond crystal has proven challenging. Here we demonstrate variable-magnetic-field, microwave-enabled cross-polarization from the NV electronic spin to protons in a model viscous fluid in contact with the diamond surface. Slight changes in the cross-relaxation rate as a function of the wait time between successive repetitions of the t","authors_text":"A. Denisenko, C.A. Meriles, D.B.R. Dasari, F. Shagieva, J. Wrachtrup, P. Neumann, R. Reuter, R. St\\\"ohr, S. Zaiser","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-03-15T05:59:51Z","title":"Microwave-assisted cross-polarization of nuclear spin ensembles from optically-pumped nitrogen-vacancy centers in diamond"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.05608","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:ceaa1811e1c9a1e7310d6f12bda9a61945df2a4e6b6917454015b9b3a96e95da","target":"record","created_at":"2026-05-18T00:09:15Z","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":"49d811c134fa5fd39427313dc0fc20500824bf815194664e43b58145f11b69c0","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-03-15T05:59:51Z","title_canon_sha256":"28646dbc60a39c36dc20a0a824bcd0fd451e0fb11fa8aacb91639ac4fef87acf"},"schema_version":"1.0","source":{"id":"1803.05608","kind":"arxiv","version":1}},"canonical_sha256":"b22a3043bec9f03d080e69f1be46610265e5b554186c3c7b8eb490e7fa914152","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b22a3043bec9f03d080e69f1be46610265e5b554186c3c7b8eb490e7fa914152","first_computed_at":"2026-05-18T00:09:15.594372Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:09:15.594372Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"WSUQHB9ukXxlUvj55jxex/fRwVrF2DIEhh2QGkEP8TfCO34ZS6lbbAcwq6+pEw22LoOGOsuwo8HUy9JAiJf/CA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:09:15.595002Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.05608","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ceaa1811e1c9a1e7310d6f12bda9a61945df2a4e6b6917454015b9b3a96e95da","sha256:5ba3ada67ef2592a3f3011cff1c4249227c513600254c0e95752684bd96798d0"],"state_sha256":"cfe10a80869aeac3522aa127a88588ec7e45e6e0f4b3ba6edcd6c18678f8debe"}