{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:7PJK7SPPEF5ET27YRZZVQGKFC4","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":"e821455778d93a4a7ce64da0440a4ce67f8332096459ecf0af84bcb0982ef60d","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-04-17T06:56:54Z","title_canon_sha256":"10415c526115a15f2613f3700f83a3d9d433f00cdebdde0aaf8e8a04070992a8"},"schema_version":"1.0","source":{"id":"1304.4709","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1304.4709","created_at":"2026-05-18T03:11:57Z"},{"alias_kind":"arxiv_version","alias_value":"1304.4709v2","created_at":"2026-05-18T03:11:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1304.4709","created_at":"2026-05-18T03:11:57Z"},{"alias_kind":"pith_short_12","alias_value":"7PJK7SPPEF5E","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_16","alias_value":"7PJK7SPPEF5ET27Y","created_at":"2026-05-18T12:27:36Z"},{"alias_kind":"pith_short_8","alias_value":"7PJK7SPP","created_at":"2026-05-18T12:27:36Z"}],"graph_snapshots":[{"event_id":"sha256:71efdc6316799022949eb9371548b67e3f27569fcb4b82899d07a8f08a86405c","target":"graph","created_at":"2026-05-18T03:11:57Z","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 report the detection and polarization of nuclear spins in diamond at room temperature by using a single nitrogen-vacancy (NV) center. We use Hartmann-Hahn double resonance to coherently enhance the signal from a single nuclear spin while decoupling from the noisy spin-bath, which otherwise limits the detection sensitivity. As a proof-of-principle we: (I) observe coherent oscillations between the NV center and a weakly coupled nuclear spin, (II) demonstrate nuclear bath cooling which prolongs the coherence time of the NV sensor by more than a factor of five. Our results provide a route to na","authors_text":"A. Retzker, B. Naydenov, F. Jelezko, I. Schwarz, J. Isoya, J.-M. Cai, J. Scheuer, L. P. McGuinness, M.B. Plenio, M. Katagiri, P. London, R. Fischer, S. Koizumi, T. Teraji","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-04-17T06:56:54Z","title":"Detecting and polarizing nuclear spins with double resonance on a single electron spin"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1304.4709","kind":"arxiv","version":2},"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":"sha256:21263efae6f0d3fdcd11b63b32ba578ddc34095341338bece86482ee90d93aed","target":"record","created_at":"2026-05-18T03:11:57Z","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":"e821455778d93a4a7ce64da0440a4ce67f8332096459ecf0af84bcb0982ef60d","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2013-04-17T06:56:54Z","title_canon_sha256":"10415c526115a15f2613f3700f83a3d9d433f00cdebdde0aaf8e8a04070992a8"},"schema_version":"1.0","source":{"id":"1304.4709","kind":"arxiv","version":2}},"canonical_sha256":"fbd2afc9ef217a49ebf88e735819451717a588526760ef8ea5f3709d7385940d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fbd2afc9ef217a49ebf88e735819451717a588526760ef8ea5f3709d7385940d","first_computed_at":"2026-05-18T03:11:57.565189Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:11:57.565189Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Rlihznt2HZsfbDmUV4i65vF8zegEnWzxNiyw9PlUScOFepboI7YIQ+DTWcWK4k+jBrDuWN6VOlwH8YhYE2FzDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:11:57.565891Z","signed_message":"canonical_sha256_bytes"},"source_id":"1304.4709","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:21263efae6f0d3fdcd11b63b32ba578ddc34095341338bece86482ee90d93aed","sha256:71efdc6316799022949eb9371548b67e3f27569fcb4b82899d07a8f08a86405c"],"state_sha256":"5b013f01feed14c9d616fe0237f42539d59396c8ad2b01d791bf83ab30d3378f"}