{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:7EEIABPSKVY7Y5L2HFCTY33NHP","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":"10646bec7f10b11aad1727e3b648718d07d2c2c8ad13c47cb73d157a47bb53bd","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2008-11-19T22:47:07Z","title_canon_sha256":"bbe541458d0b3b333663ef119d15910b5586545e6c95174cbec4d1a84979cc99"},"schema_version":"1.0","source":{"id":"0811.3236","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0811.3236","created_at":"2026-05-18T03:24:54Z"},{"alias_kind":"arxiv_version","alias_value":"0811.3236v2","created_at":"2026-05-18T03:24:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0811.3236","created_at":"2026-05-18T03:24:54Z"},{"alias_kind":"pith_short_12","alias_value":"7EEIABPSKVY7","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"7EEIABPSKVY7Y5L2","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"7EEIABPS","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:aa6ed59cc23f33932293956e91ffa79838bad26bab212991d65ad2ff04ad6bf4","target":"graph","created_at":"2026-05-18T03:24:54Z","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":"For coherent electron spins, hyperfine coupling to nuclei in the host material can either be a dominant source of unwanted spin decoherence or, if controlled effectively, a resource allowing storage and retrieval of quantum information. To investigate the effect of a controllable nuclear environment on the evolution of confined electron spins, we have fabricated and measured gate-defined double quantum dots with integrated charge sensors made from single-walled carbon nanotubes with a variable concentration of 13C (nuclear spin I=1/2) among the majority zero-nuclear-spin 12C atoms. Spin-sensit","authors_text":"A. J. Bestwick, C. H. Stwertka, C. M. Marcus, D. Marcos, F. Kuemmeth, H. O. H. Churchill, J. W. Harlow, S. K. Watson","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2008-11-19T22:47:07Z","title":"Electron-nuclear interaction in 13C nanotube double quantum dots"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0811.3236","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":"sha256:49c84a939fb3c256b67097ae4c98bd701dc8169dbb9363195b53e00d78909c9b","target":"record","created_at":"2026-05-18T03:24:54Z","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":"10646bec7f10b11aad1727e3b648718d07d2c2c8ad13c47cb73d157a47bb53bd","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2008-11-19T22:47:07Z","title_canon_sha256":"bbe541458d0b3b333663ef119d15910b5586545e6c95174cbec4d1a84979cc99"},"schema_version":"1.0","source":{"id":"0811.3236","kind":"arxiv","version":2}},"canonical_sha256":"f9088005f25571fc757a39453c6f6d3bfa4e07648400d708a877707ab6f733f5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f9088005f25571fc757a39453c6f6d3bfa4e07648400d708a877707ab6f733f5","first_computed_at":"2026-05-18T03:24:54.610119Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:24:54.610119Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Y4ao3wLGWNQPI0KNhVZJGLAoIpfAUPhPRM9IxKGMpJqF9J3h73OtczykVa8QNWNu1TnjVzw+M8MDwRMj5PmWBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:24:54.610777Z","signed_message":"canonical_sha256_bytes"},"source_id":"0811.3236","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:49c84a939fb3c256b67097ae4c98bd701dc8169dbb9363195b53e00d78909c9b","sha256:aa6ed59cc23f33932293956e91ffa79838bad26bab212991d65ad2ff04ad6bf4"],"state_sha256":"1bd679c9dd8b103b788617877644f7a076bc40072ae2657ffcdd39101022b85c"}